In some climate circles, solar geoengineering is akin to a swear word. Also known as solar radiation modification (SRM), it means deliberately modifying the earth’s atmosphere to reflect solar radiation. It provokes forceful pushback, because it’s unclear how it would affect the earth’s agriculture, ozone layer and ecosystems.But it’s been attracting interest because it’s clear it would do one thing well: cool the planet.If we’re not moving fast enough on emissions reductions and carbon removal to avoid 1.5 degrees Celsius of warming, could solar geoengineering, despite its risks, be less dangerous than a hotter world?In this episode, Shayle talks to Dan Visioni, a climate modeler who studies solar geoengineering at Cornell University’s Sibley School of Mechanical and Aerospace Engineering.They discuss what solar geoengineering might look like in the real world. Stratospheric sulfate injections would mimic the effects of volcanic eruptions like Mount Pinatubo in 1991, which cooled the planet by 0.5 degrees Celsius in the following year. Marine cloud brightening would use salt aerosols to brighten a type of cloud that reflects solar radiation, a phenomenon already created by ocean-going ships.They also cover cirrus cloud thinning and—straight out of a sci-fi movie—space mirrors.They explore key questions, such as: What do we know about the potential effects on ozone, precipitation and ecosystems? What do we need to research and what could we learn by testing? Which could scale faster—Carbon dioxide removal or solar geoengineering?  Solar geoengineering could cost a tiny fraction of the amount required to scale up CDR. Does that mean it could buy us time to draw down emissions more cheaply? Or does the relative affordability enable a rogue actor to deploy it without international collaboration? And who gets to decide whether the world deploys solar geoengineering? Whose hand is on the thermostat, so to speak? Links: Nobel prize winner Paul Crutzen’s influential 2006 paper on stratospheric sulfur injection A provocative New York Times Op-Ed promoting geoengineering from David Keith, professor of applied physics and public policy at Harvard who studies geoengineering Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arca​dia​.com/​c​a​t​alyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee​.net/join.

We're presenting a trailer for a new show from Post Script Media, called Climavores.Climavores is a show for eaters who don’t want to cook the planet. Each week, journalists Tamar Haspel and Mike Grunwald explore the complicated, confusing, and surprising relationship between food and the environment. Episodes drop on June 21. Subscribe on Apple, Spotify, or anywhere you listen to podcasts.

Biomass. It's the organic matter in forests, agriculture and trash. You can turn it into electricity, fuel, plastic and more. And you can engineer it to capture extra carbon dioxide and sequester it underground or at the bottom of the ocean. The catch: The world has a finite capacity for biomass production, so every end use competes with another. If done improperly, these end uses could also compete with food production for arable land already in tight supply.So which decarbonization solutions will get a slice of the biomass pie? Which ones should?In this episode, Shayle talks to Julio Friedmann, chief scientist at Carbon Direct. They cover the sources of biomass, everything from municipal solid waste to kelp.They also survey the potential end-uses, such as incineration to generate power, gasification to make hydrogen, and pyrolyzation to make biochar, as well as fuel production in a Fischer-Tropsch process. In a report from Lawrence Livermore National Laboratory, Julio and his co-authors propose a new term called biomass carbon removal and storage, or ‘BiCRS’, as a way to describe capturing carbon in biomass and then sequestering it. Startups Charm Industrial and Running Tide are pursuing this approach. Julio and his co-authors think of BiCRS as an alternative pathway to bioenergy carbon capture and storage (BECCS). They then zoom in on a promising source of biomass: waste. Example projects include a ski hill built on an incinerator in Copenhagen and a planned waste-to-hydrogen plant in Lancaster, California. Shayle and Julio also dig into questions like: How to procure and transport biomass, especially biowaste, at scale?  How to avoid eco-colonialism, i.e. when wealthy countries exploit the resources of poorer countries to grow biomass without meaningful consent? If everyone wants it, when is biowaste no longer waste? And when there’s a shortage of waste—like corn stover, for example—what’s the risk of turning to raw feedstocks, like corn? How to pickle trees? (yes, you read that right) Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arca​dia​.com/​c​a​t​alyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee​.net/join.

There’s a bottleneck in climate tech that we don’t talk about enough: land availability. It’s a physical resource you need to support biomass, renewables, mineral mining, and other essential tools of decarbonization. So how much is enough, and where do we need it?In this episode, Shayle talks to his colleague Andy Lubershane, managing director of research at Energy Impact Partners. Andy argues that land—geography, landscape and the rights to land—will be a common constraint among climatetech solutions as we reach gigaton-scale reductions of emissions.Andy and Shayle survey the industries where the availability of land could play a critical role, exploring questions like: How much land will we need for solar and wind power in deep decarbonization scenarios like the Net Zero America Study, and where? How does that amount of land change depending on siting, permitting and regulatory challenges of building transmission? What about the “pores” of underground space needed for carbon sequestration and hydrogen storage? For technologies that require both land for renewables and underground storage for carbon sequestration, like Direct Air Capture, where do those locations overlap? Could we see a run on waste biomass, given the tight supply of arable land suitable for producing new biomass?  Where will access to land constrain supply of metals needed for batteries and infrastructure? Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arca​dia​.com/​c​a​t​alyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee​.net/join.

Consumer energy data is vital to the energy transition, especially distributed energy resources (DERs). For example, a rooftop solar company needs consumer energy data to analyze bill savings from a potential solar installation. An electric vehicle (EV) charging company needs it to offer a customer special rates on EV charging.But that data has long been incredibly difficult to access – available only in PDFs and hard-to-access utility databases – often coming in very different formats and standards.And yet companies are trying to overcome these challenges by bringing that data into easy-to-use interfaces. Arcadia is one such company. Earlier this month it raised $200 million, an investment that valued the company at $1.5 billion. Yesterday, Arcadia purchased commercial energy-data provider Urjanet. In this episode, Shayle talks to Arcadia CEO Kiran Bhatraju about how to build a business around consumer energy data and how that data could become a goldmine for DER providers. A few important disclosures: Shayle’s firm Energy Impact Partners (EIP) is an investor in Arcadia. EIP led the company's Series A and has invested in every round since. Arcadia is a sponsor of this podcast. Kiran is also a friend of Shayle’s, and Shayle is an Arcadia customer.Shayle and Kiran discuss key questions about consumer data, such as: What are the most valuable data points? Kiran and Shayle talk about grid carbon intensity, on-time bill payments and more. What level of fidelity do we need from the data? Do we need precise real-time data to prove savings to customers and support higher DER sales, or will high-level estimates suffice? Do we need an ever-expanding pool of smart devices, or can we unlock most of the value with a few key devices, such as a hot water heater, heat pump and EV charger? How do you develop a moat that protects you from competitors in the consumer data space? What could the future of the DER market look like? Kiran argues that DER providers will shift from selling widgets to selling platforms and packages as whole-home managers. Plus, Shayle reveals the smartest business idea that he ever turned into reality.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee​.net/join.

Stock markets are in decline. Inflation is on the rise. Interest rates are up. Private tech companies are laying off workers. Is this the long-awaited market correction that never quite materialized during the bull market of the last 13 years?And what does it mean for climate tech? In this episode, Shayle talks to Saloni Multani, a partner at Galvanize Climate Solutions and former chief financial officer for Joe Biden’s 2020 campaign. Shayle and Saloni place the current moment in historical context. They cover the recent wave of low-cost capital that poured into climate tech and the low interest rates that gave renewables an advantage over fossil-fuel investments. And they dive into some pressing questions like: Are the broader market impacts on climate tech delayed? Or is climate tech somehow more insulated than general tech companies? The green premium question: Will a downturn in the market jeopardize investments in more expensive but lower-carbon alternatives to fossil fuels, such as airlines’ recent purchases of Sustainable Aviation Fuels, or SAFs? How should climate tech investors rethink their strategies? What should entrepreneurs expect in the coming years? Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arcadia.com/catalyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee.net/join.

We’re reversing roles today by taking listener questions for our host, Shayle Kann. He’s usually the one interviewing our guests, but he also has expertise (and maybe a few hot takes) to share. He leads a $350 million fund that invests in early-stage climate startups, so he spends most of his time trying to figure out which technologies and businesses will help us decarbonize as quickly as possible.GreenBiz senior energy analyst Sarah Golden joins the show to ask Shayle your questions and dissect the answers with him. They cover: The causes of rising solar costs and other troubles in the solar industry  The biggest bottlenecks in climate tech The the startups that are trying to reduce the carbon intensity of fertilizing crops amid a global fertilizer crisis The overhyped hate for crypto mining  The race between synthetic fuels (aka synfuels) and biofuels What happens to the pace of deployment for Direct Air Capture if power grids are slower to decarbonize than expected? Plus: Shayle’s owl tattoo and the drinking game Shayle’s wife made up for whenever he begins listing things. Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arcadia.com/catalyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee.net/join.

Carbon Dioxide Removal (CDR) is having a moment. The most recent report from the Intergovernmental Panel on Climate Change found that the world cannot meet the targets of the Paris Agreement without removing hundreds of gigatons of carbon from the atmosphere.Big companies like Alphabet, Stripe and others have formed the Frontier Fund, a nearly $1 billion joint-effort to jump-start the market to purchase CDR offsets. Elon Musk is even sponsoring a $100 million X-Prize focused on it.We’re not talking about point-source carbon capture and storage, often called CCS. And we’re not just talking about Direct Air Capture or planting trees, the most well-known forms of CDR. Carbon Dioxide Removal also includes technologies involving kelp, bamboo, cement, mangroves, biochar, and others. In this episode, Shayle explores CDR with Ryan Orbuch, a partner at Lowercarbon Capital who leads the firm’s carbon-removal work. Ryan helped to start Stripe’s carbon removal procurement program and has been involved in Stripe's nearly $1 billion Frontier Fund. Shayle and Ryan cover key questions around CDR, like: What are the important characteristics of a carbon-removal technology? What roles do permanence and additionality play? Will investments in removal come at the expense of reducing emissions? Will CDR become a commodity market? Shayle also shares his experience with the first wave of carbon offsets, and the challenges that undermined those efforts. Ryan talks about separating out the cost of measurement and verification from the costs of removal, as well as why we should be thinking about radiative forcing more holistically, and not just carbon removal alone.Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arcadia.com/catalyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee.net/join.

A massive green hydrogen project in Utah has won a $504.4 million conditional loan guarantee from the U.S. Department of Energy’s Loan Programs Office. The project, called Advanced Clean Energy Storage (ACES), will generate hydrogen from renewables and store it deep underground in what’s called a salt dome. ACES will use that stored hydrogen to generate electricity in a hybrid power plant, running on both natural gas and hydrogen.ACES is one of the many planned hydrogen hubs in the U.S., and once completed it would be one of the largest in the country. The loan will finance an initial 220 megawatts of hydrogen production and 300 gigawatt hours of storage.What did it take to put this deal together, and what does it say about the future of hydrogen hubs more broadly?In this episode, Shayle talks to Jigar Shah, director of the Department of Energy’s Loan Programs Office (LPO) about the project. The LPO is the government agency behind the conditional loan guarantee.Shayle and Jigar talk about what made this particular project attractive to the LPO. They talk about why the salt dome storage was essential to making the project work, and the other uses for hydrogen beyond power, such as a feedstock for ammonia production and other heavy industries. They also break down the difficulties in transporting hydrogen and the need to site hydrogen production near consumption.Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arcadia.com/catalyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee.net/join.

The metals used to make batteries are in hot demand. In 2021, the price of one form of lithium skyrocketed by over 400%. Automakers are racing to lock up supply deals for key minerals as they roll out new electric-vehicle models. And the market value of companies with mining assets, or new technologies to unlock them, has skyrocketed.What’s behind this scramble for metals and what does it mean for the energy transition? In this episode, Shayle talks to Kurt House, chief executive officer and co-founder of KoBold Metals. Kobold uses artificial intelligence to discover and characterize new sources of key battery metals. Kurt and Shayle survey five key materials of the energy transition — lithium, nickel, copper, cobalt and rare earth metals. They compare the roles of each one in different types of batteries and discuss how the changing battery cell chemistries are shaping metal markets. Kurt explains the different factors shaping supply, including recycling, new mineral discoveries and shifting geopolitics.We want to hear from you! Take our quick survey for a chance to win a $100 Amazon gift card. This will help us bring you more relevant content.Catalyst is brought to you by Arcadia. Arcadia allows innovators, businesses and communities to break the fossil fuel monopoly through its technology platform, Arc. Join Arcadia’s mission and find out how you or your business can help turn a fully decarbonized grid into a reality at arcadia.com/catalyst.Catalyst is supported by Advanced Energy Economy. AEE is on the front lines of transforming policy that accelerates the move to 100 percent clean energy and electrified transportation in America. To learn how your business can play a key role in transforming policy and expanding markets, visit aee.net/join.