Earth Day: How much do you know about climate change? Take our quiz.

A lot of people have opinions about climate change, but do they really know what they are talking about? Test your knowledge with this quiz.

3. According to global surface temperature data from the National Oceanic and Atmospheric Administration and NASA's Goddard Institute for Space Studies, how many of the top 10 hottest years on record have occurred in the past 10 years.

NASA/Reuters/File
A full moon appears through the blue glow of the Earth's atmosphere, in this photo taken aboard the Space Shuttle Discovery in 1999.

zero

one

five

nine

Javascript is disabled. Quiz scoring requires Javascript.

You've read  of  free articles. Subscribe to continue.