Geoengineering involves humans making intentional, large-scale modifications to the Earths geophysical systems in order to change the environment.

Fragile economies and weak infrastructures tend to worsen the results of climate disruptions, a problem exemplified by Bangladesh's vulnerability to monsoons, accelerating desertification in northern China, and, most visibly, Hurricane Katrina's devastation in New Orleans.

Preventing global warming from becoming a planetary catastrophe may take something even more drastic than renewable energy, superefficient urban design, and global carbon taxes.

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