Abstract
The world at present is fast approaching a climate cliff. Science tells us that an increase in global average temperature of 2°C (3.6°F) constitutes the planetary tipping point with respect to climate change, leading to irreversible changes beyond human control. A 2°C rise is sufficient to melt a significant portion of the world's ice due to feedbacks that will hasten the melting. It will thus set the course to an ice-free world. Sea level will rise. Numerous islands will be threatened along with coastal regions throughout the globe. Extreme weather events (droughts, storms, floods) will be far more common. The paleoclimatic record shows that an increase in global average temperature of several degrees means that 50 percent or more of all species—plants and animals—will be driven to extinction. Global food crops will be negatively affected.This article can also be found at the Monthly Review website, where most recent articles are published in full.Click here to purchase a PDF version of this article at the Monthly Review website.
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