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A small increase from 0.03% carbon dioxide to 0.04% can have a dramatic effect on climate.
CO2 is a great airborne fertilizer aiding additional plant growth and causes plants to need less water.
I'm afraid I don't buy into the Great Green Tax Scam.... Taxing this small population when new coal fired stations are coming on line every week in China (for example) is completely pointless.
'Additional Charges' such as the first year loading on road tax is another stealth tax...

Don't even get me going on Stamp Duty.