Nonrenewable resources include coal,oil, and natural gas, what are thre challenges with managing nonrenewable energy sources?

Answer 1

Check this answer posted by Writeacher.

http://www.jiskha.com/display.cgi?id=1209181127

Answer 2

Here's an answer I posted.

http://www.jiskha.com/display.cgi?id=1197853324.1197854537