Yes, CO2 levels have varied in Earth’s past. But today’s levels are the highest in millions of years and increasing at an unprecedented rate.
As we emit more fossil fuels, atmospheric CO2 concentrations are rising each year — reaching levels that are unprecedented in history.
Unchecked warming emissions are projected to leave hundreds of houses of worship in areas vulnerable to chronic flooding by midcentury.
U.S. states are getting warmer with climate change — check out how your state stacks up.
Happy Earth Day! Take a look at how much warming has occurred since the first Earth Day in 1970.
Local temperature data from 1970 to 2018 shows warming trends across the country — and Americans are already feeling the effects.
San Antonio is one of the most challenging cities for spring allergies sufferers, and rising temperatures are making it worse.
Climate change is affecting the growing season — and the allergies that come with it — around the country.