I don’t hold with those who want to blame global warming wholly on American industry and American cars.  The slashing-burning of hundreds of square miles of Amazon rain forest each day, and the air pollution in Mexico City and Beijing, show the need for a global response.

There are two principal ways human beings can reduce greenhouse gases:  (1) covering more land with green plants that will consume carbon dioxide from the air; and (2) reducing our carbon dioxide emissions.

Some simple considerations of architecture address both concerns.