If global warming is chronic (It may be or not, who knows, maybe it's cyclic? All we have is visual data of receding ice around the poles and we don't know what causes it) and earth threatening, wouldn't anyone try anything to cool the earth? For example, shoot debris in the upper atmosphere to help create a mini ice age?
Do you know there are 3 major greenhouse gases that could theoretically trap heat in the atmosphere? (1)Water vapor is the most prevalent - at 95% of all greenhouse gases. (2)CO2 is the second highest in concentration at under 5% of total greenhouse gases. (3)Methane has been scientifically proven to be approximately 25 times more effective in trapping heat in the atmosphere than CO2.
What do environmentalists who believe greenhouse gases cause a deadly heating of the earth propose to stop global warming? Solely eliminating CO2? Really? That's your answer? That's your show of concern? ARE YOU CONCERNED? If you aren't concerned, why should I be concerned?