7 American Species Threatened By Global Warming (SLIDESHOW)

Global warming is already starting to have a severe effect on our environment. The Environment Defense Fund has picked seven "ambassador species" -- living plants and animals - who are already struggling to survive. Climate change is affecting their natural habitats and the EDF fears that without action
there's a good chance these species won't make it past our lifetimes.

Here are the seven ambassadors:

• • • • • • • Sugar maple