Check this answer posted by Writeacher.
http://www.jiskha.com/display.cgi?id=1209181127
Nonrenewable resources include coal,oil, and natural gas, what are thre challenges with managing nonrenewable energy sources?
2 answers
Here's an answer I posted.
http://www.jiskha.com/display.cgi?id=1197853324.1197854537
http://www.jiskha.com/display.cgi?id=1197853324.1197854537