It turns out (and this is not the first time this information has come out in a scientific study) that Mars is undergoing global warming too, and at a much faster rate than Earth is. This fits in quite well with what the solar scientists have been saying about the sun currently being in a hotter part of its cycle. Also note that there is no industry on Mars, unless you want to say that the couple of probes we’ve sent that way are doing it all.
Maybe we should send Al Gore to Mars to convert the Martians to his carbon-neutral lifestyle, because I’m just POSITIVE that will help.