Weather extremes - droughts, floods, and heat waves - on the rise worldwide over the past 50 years, are linked to climate change, according to Chris Field.
The rise in atmospheric nitrous oxide - a greenhouse gas - is largely the result of the use of nitrogen-based fertilizers, according to Berkeley chemists.
The U.S. Fish and Wildlife Service yesterday announced $1.4 million in grants to help save bats - which play a key role in agriculture - from white nose syndrome.
White nose syndrome, a deadly fungal disease affecting bats in North America, has spread to Alabama, Missouri and Delaware, according to wildlife officials.
At least 11 confirmed tornadoes struck the Dallas-Fort Worth area on April 3, causing damage but no deaths. Here's what's known now, plus the best videos.