Which has a bigger impact on North America's climate?

http://www.ext.colostate.edu/pubs/insect/05528.html

http://www.nature.com/ngeo/journal/v6/n1/full/ngeo1691.html

Dendroctonus ponderosae scientifically makes more sense than CO2. After all, Dendroctonus ponderosae theory has not been debunked as thoroughly as CO2.

Cyclops, you better bring Trevor up to speed on this issue, as he probably thinks you are referring to Ringo Starr.

Warm winters are sopposed to make them worse ?

What happened to the Warm Winter predictions ?

Big fail

What do you think is responsible for the pine beetle population explosion?

Hmm you didn't ask a question, so you will probably be reported, as I just was.

Which has a bigger impact on North America's climate?

http://www.ext.colostate.edu/pubs/insect/05528.html

http://www.nature.com/ngeo/journal/v6/n1/full/ngeo1691.html