By 
jared-huffman-with-guitar
US Rep. Jared Huffman (D-Calif.), playing a guitar
 

MJ: How would the environmental problems associated with cannabis change if it were legalized?

JH: I think it would change overnight. You don’t see people trekking back into the forest to grow soybeans.

Full Article:

http://www.motherjones.com/environment/2014/04/representative-jared-huffman-cannabis-congressman