Cox said Gore helped strengthen clean air health standards, sped clean up of Superfund toxic waste sites, reduced automobile tailpipe pollution, and protected America's spectacular landscapes.

CNN: Sierra Club endorses Gore for president

The debate over air pollution and, more specifically, the regulation of air pollution, raged on this week as the Environmental Protection Agency (EPA) watered down its cross-state pollution rule and House Republicans moved to delay new rules on toxic air pollution from cement plants, solid waste incinerators, and industrial boilers.

FORBES: Two New Reasons to Worry about Air Pollution: Obesity and Diabetes