I need to know:

is it written nonrenewable or non-renewable?

Thanks
-MC

2 answers

http://grammar.ccc.commnet.edu/grammar/marks/hyphen.htm

Using the hyphen with this prefix every time will make sure there is no chance for misreading. The only "non" word I can think of that doesn't need a hyphen is "nonsense"!!

http://www.onelook.com/?w=non*&ls=a
Good; that's how I was spelling it!
-MC