Myths about global warming



Re: Irrelevant (PM Mailbag Friday, 18 December 2015) – I wish there was more space to educate you. However, here is the first of many to come. Maybe you are confusing pollution with GM or climate change?

MYTH 4: CO2 is the most common greenhouse gas.

FACT: Greenhouse gases form about 3% of the atmosphere by volume. They consist of varying amounts, (about 97%) of water vapour and clouds, with the remainder being gases like CO2, CH4, Ozone and N2O, of which carbon dioxide is the largest amount. Hence, CO2 constitutes about 0.04% of the atmosphere. While the minor gases are more effective as “greenhouse agents” than water vapour and clouds, the latter are overwhelming the effect by their sheer volume and – in the end – are thought to be responsible for 75% of the “Greenhouse effect”.

At current concentrations, a 3% change of water vapour in the atmosphere would have the same effect as a 100% change in CO2.

Those attributing climate change to CO2 rarely mention these important facts. – See more at: http://www. php?id=3#sthash.W199sYxO.dpuf