The Web Comic XKCD – Which comes with the following warning;

Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors)

recently published this:

It is easy to deny climate change, to say “Global Warming, nothing to worry about. it just means that we will be able to grow grapes in Yorkshire”. The reality is that if we don’t stop pumping CO₂ into the atmosphere we will be producing a climate that is as different from today’s as today’s from that of the last ice age.