Humanity’s Choice (via M.I.T.): Inaction (“No Policy”) eliminates most of the uncertainty about whether future warming will be catastrophic. Aggressive emissions reductions greatly improves humanity’s chances.
In this post, I will summarize what the recent scientific literature says are the key impacts we face in the coming decades if we stay anywhere near our current emissions path. These include:
- Staggeringly high temperature rise, especially over land — some 10°F over much of the United States
- Permanent Dust Bowl conditions over the U.S. Southwest and many other regions around the globe that are heavily populated and/or heavily farmed.
- Sea level rise of some 1 foot by 2050, then 4 to 6 feet (or more) by 2100, rising some 6 to 12 inches (or more) each decade thereafter
- Massive species loss on land and sea — perhaps 50% or more of all biodiversity.
- Unexpected impacts — the fearsome “unknown unknowns”
- Much more extreme weather
- Food insecurity — the increasing difficulty of feeding 7 billion, then 8 billion, and then 9 billion people in a world with an ever-worsening climate.
- Myriad direct health impacts
Remember, these will all be happening simultaneously and getting worse decade after decade. Equally tragic, a 2009 ...