Global Warming hawkers calling Global Warming skeptics names has become a serious problem.

Is one says that CO₂ is a necessasry part of the air, people say you are in favor of polluting the air.

Is one says that human beings are not responsible for the (slight) rise in CO₂ over the last 150 years, you are compared to Hitler.

The GW hawkers are losing their audience. Honest scientists left this type of discussion a long time ago.