This series of downloadable reports are an excellent resource of information on climate change.  From the website:  http://www.pewclimate.org/global-warming-basics/climate_change_101

“In an effort to inform the climate change dialogue, The Pew Center on Global Climate Change and the Pew Center on the States have developed a series of brief reports entitled Climate Change 101: Understanding and Responding to Global Climate Change.

These reports are meant to provide a reliable and understandable introduction to climate change. They cover climate science and impacts, technological solutions, business solutions, international action, recent action in the U.S. states, and action taken by local governments. The overview serves as a summary and introduction to the series.”

The website provides a wealth of other information on climate change - but this is a good place to start.