Do you believe human activities are making the earth warmer?

Do you believe human activities are making the earth warmer and what is your attitude?

If you think human activities are only partially responsible for making the Earth warmer, for the purpose of this poll, you should choose one of the "I believe...." options.

(You can vote anonymously. PLEASE take just a few seconds to vote. A better picture of public opinions to this issue will be invaluable for scientists as well as policy makers or anyone in search of solutions. At the minimum, the poll makes people consider this issue and the issues around it.)

Plumes of (greenhouse?) gases released by a factory on Highway 5
Plumes of (greenhouse?) gases released by a factory on Highway 5