How Much Could Be Saved by Energy Efficiency?

The international energy agency has estimated that strict efficiency policies allow the world to achieve more than forty % of the greenhouse gas emissions cuts needed to reach its climate goals, even without new technology. Despite substantial energy efficiency gains in the past few decades and decreases in output from places like the united states, we are using more energy than we have pretty much forever. And emissions wildly surpass our or the earth's ability to handle them.