See the propaganda in the article they use the term 6,100 metric tons to describe the amount mankind puts into the atmosphere, but do not mention that there is more than 133 times this amount that nature puts into the atmosphere. Mankind contributes less than the normal fluctuations that either sea plankton or the land bio mass puts up.
The logical approach would be to analyze the Sun's output first and foremost. The cause of virtually all global warming.