Just watch the whole thing... (This is number six in a series. Search for "Ted Cruz" on this site for the others...)
I would also note that our planet has been warming and glaciers melting since the last ice age 15,000 years ago. Our sun varies in output according to certain vague and unknown timed cycles. About 99% of the energy absorbed by our biosphere comes from the sun. Our solar system circumnavigates our galaxy once every 250 million years. We know very little about the climatic effects of any of this. Period. The science is largely unknown at this time. Run from anyone who tells you otherwise.