More or Less: Behind the Stats Is planet Earth getting greener?
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Aug 10, 2024 
Jordan Peterson, a Canadian psychologist and culture war commentator, joins Dr. Chi Chen, a researcher at Rutgers University, to discuss whether Earth is truly getting greener. They explore revealing satellite data showing a 20% increase in vegetation over two decades while unpacking the myths surrounding global greening. The conversation examines the successes of China's tree planting and the complexities of climate change impacting vegetation growth. They highlight that despite some positive trends, the overall repercussions of climate change remain detrimental.
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Greening Claim Investigation
- Jordan Peterson claimed increased CO2 is beneficial for the environment, leading to a 20% greening.
- Listener William McNiven questioned this claim, prompting an investigation by More or Less.
Satellite Data and Leaf Area Index
- Satellites measure reflected light to determine vegetation cover, using wavelengths absorbed by plants.
- Dr. Chi Chen's research analyzes this data to calculate the leaf area index, indicating greening or browning.
Global Greening Rate
- Chi Chen's research suggests a global greening of approximately 2.3% per decade, not 20% as Peterson claimed.
- While China has seen a 20% increase, the global figure is closer to 5% over 20 years.