Tens of thousands march on the National Mall and past the White House on Feb. 17, 2013, to urge President Obama to reject the Keystone XL pipeline and to show leadership on other climate change issues. | Jay Mallin/Corbis

5 Ways to Become a Citizen Climate Scientist

Non-professional scientists can contribute to climate change research by participating in one of these five projects.

February 20, 2013
7:40 AM EST
Storm comparisons of Ophelia (2005) on Cyclone Center. |
USS Vicksburg under sail c1897-98. | US Navy (
First cherry blossoms are pictured before the silhouette of the Hof Church and the castle in Dresden, Germany, Jan. 4, 2013. | Matthias Hiekel/Corbis
Climate citizen volunteers with rain and snow gauges. |
Journalists in the main hall of the EU at the first day of the European Leaders (EU) summit at the European Council headquarters in Brussels, Belgium, on Thursday, Feb. 7, 2013. | Sander de Wilde/Corbis