Human-generated emissions of CO2 this year are expected to reach 35.6 billion tons. That’s up 2.6 percent from what was emitted in 2011, the previous record holder.
If it seems like autumn leaves are taking longer to change color, you're not imagining things. Over the past 25 years, the onset of autumn has shifted.
You knew it was warm last month, but today it's official: it wasn't just warm; it was the warmest March ever recorded in the U.S.
Online searches for the word"pollen" have gone through the roof this spring, and if you know anyone with seasonal allergies (and who doesn't?) this isn't surprising.
A graphical look at the way winters have changed in the United States between 1895 and 2010.
A two-man trek across Antarctica to commemorate the first South Pole expeditions a century ago.