Well well, you have once again proven your ignorance to science and mathematics. Well done son!!!! Man has contributed 0.03% of 420PPM of CO2. NOT 300PPM. 0.03% = 0.0003. So the maths is 420PPM x 0.0003 = 0.126PPM. That is 1.26 parts in 10 million. Now, tell me exactly, how such a miniscule...