Global average temperatures are generally higher in El Niño years vs. La Niña years.
Summer seems to have lasted a little longer in much of the country this year.
Ten years ago, Hurricane Katrina became one of the worst natural disasters in U.S. history.
Climate change has impacted the size and geographical distribution of tick populations.
More CO2 means larger poison ivy plants and more toxic oil per plant.
As the graphic shows, people cause most wildfires. But lightning-ignited fires burn by far the most territory.
Climate change can be natural, but what’s happening now can’t be explained by natural forces.
A snapshot of how 2012 stacks up against the five other warmest years ever recorded in the U.S.