Renewable energy is providing clean, reliable electricity across the U.S. and around the world. It is also growing rapidly, with record numbers of new wind and solar installations in the U.S. over the past few years. 

We can readily continue this rapid expansion of renewable energy by utilizing existing technologies, investing in improvements to our electricity system, and making smart policy decisions that move the country toward a clean energy future. 

Breaks down financially why San Diego residents should switch their homes to solar.

An illustration of the definition of an ecological footprint.

JOANNA M. FOSTER

Have you ever longed for a Google map of koala bears? Bald eagles? Red pandas?

Mountaintop's Removal's Effect on Humans and the Economy

Seth Borenstein

Arctic monitoring stations show carbon dioxide levels are now above 400 parts per million. Carbon dioxide is the chief climate-change gas and stays in the atmosphere for 100 years.

RIO DE JANEIRO (AP) – The earth's environmental systems "are being pushed towards their biophysical limits," beyond which loom sudden, irreversible and potentially catastrophic changes, the U