What were the main reasons behind the recent recession in the US?

 What impact did it have on the US economy? How did it impact the world economy (if at all)?

 Research the internet and find some statistics to support your answer (at least 2 such statistics).

 Make sure to cite your source(s). Please answer to all aspects of this discussion question substantially.

Make sure to respond to at least two of your peers.

Note:  Please see this very relevant video, PBS, ‘The Warning’