Better grab your calamine lotion. More CO2 means bigger poison ivy plants.
The Power Dissipation Index for hurricanes has been on the rise since 1970, along with sea surface temperatures.
The probability of a tornado touchdown somewhere in the U.S. jumps to nearly 80 percent in May and nearly 90 percent in June.
The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.
April 2014 was the first month in human history with average CO2 levels above 400 ppm.
The contiguous U.S. has warmed 2.1°F since the first Earth Day in 1970.
Climate change has increased pollen counts and the length of the pollen season, trends that are expected to continue through mid-century.
While this has been a snowy winter, the past 50 years have shown a trend of less overall spring snow cover in the Northern Hemisphere.