EPA's first National Building Competition will pick a winner that makes further strides in energy efficiency
Advanced transmissions, efficient engines and some smaller cars represent one strategy that would help an automaker meet the nation's first-ever greenhouse gas standard
Kenya is struggling to emerge from a drought that saw at least 10 million people facing starvation. Even in a nation dominated by an arid and semiarid climate, rising global temperatures are ending what little predictability farmers could count on in the past...
New research shows that local spikes in atmospheric CO2 concentrations could contribute to premature death by increasing ozone concentrations
Can a mountain tree be an endangered species?