Four of six warmest years on record have occurred since 2009.
The Southwest is heating faster than the rest of the country. Sea levels are rising. Oceans are acidifying. The North Atlantic’s hurricanes are intensifying. Piñon and lodgepole pines are dying.
A Washington, D.C.-based advocacy group has sued the University of Arizona demanding the release of a cache of documents — including two professors’ emails — related to climate change and global warming.
Earlier this year, scientists at the NOAA Mauna Loa Observatory in Hawaii announced a major threshold in the Earth system had been crossed: the concentration of the greenhouse gas carbon dioxide in Earth’s atmosphere has now passed a level not seen in the last 3 million years.
Much of the heat that was supposed to fire up the globe’s air in the past 15 years — but didn’t — has gone into the ocean, a University of Arizona oceanographer said Friday.
You just can't out-gloom an environmentalist. The Atlantic invited some luminaries to answer the question "How and when will the world end?" Some contributions were funny. Others simply plausible - a volcanic eruption from underneath Yellowstone National Park is frightfully overdue.
The question of whether Barack Obama's second term will be a failure was answered in the affirmative before his Berlin debacle, which has recast the question, which now is: Will this term be silly, even scary in its detachment from reality?
President Obama should spend his remaining years in office making the United States part of the solution to climate change, not part of the problem. If Congress sticks to its policy of obstruction and willful ignorance, Obama should use his executive powers to the fullest extent. We are out …
Photographer James Balog and filmmaker Jeff Orlowski scout Survey Canyon on the Greenland ice sheet. Their documentary "Chasing Ice" is a quest to silence climate change skeptics.
"It is better to light a single candle than to curse the darkness" was a favorite Chinese proverb of the late "Peanuts" cartoonist Charles Schultz. Photographer James Balog must have taken that to heart as he noticed changes to the wild world he documents, and heard all the cursing dominatin…
With this year’s property tax assessment my home is worth just about what I owe on my mortgage. I’m going to have a lot in common with the redneck who ignores the “Do not enter when flooded” sign. We’re both under water and we have no one to blame but ourselves.
With natural gas prices at their lowest levels in years, Tucson Electric Power Co. hasn't been burning coal at its south-side power plant lately.
The saguaro cactus - a tall, handsome, enduring symbol of the Sonoran Desert - is proving to be an upwardly mobile species. In terms of elevation, that is.
This saguaro grows under an oak tree "nurse plant" in a woodland area at 4,500 feet - well above the typical altitude for saguaros.
WASHINGTON - Warming air from climate change isn't the only
thing that will speed ice melting near the poles - so will the
warming water beneath the ice, a new study headed by University of
Arizona researchers points out.