Our most brilliant scientists have gathered together in Switzerland to study Global Warming (a.k.a. “Climate Change”). Their deliberations have now borne fruit of the utmost significance, i.e. that Global Warming causes  SOCIALISM!
People who become Socialists are known to have extreme, and at times life-threatening, allergies to cow farts! These particular cow farts come out of a mutant strain of cows.

Cow farts, as we now know, are one of the main causes of global warming.
Unfortunately, there is no known cure for Socialism and no known cure for cow farts.