What the link mentions is that we're observing CO2 concentration going from 2% to 3% of the atmosphere in over a few centuries, and that it's due to humans. Thi

What the link mentions is that we're observing CO2 concentration going from 2% to 3% of the atmosphere in over a few centuries, and that it's due to humans. This, on its own (that is, without the simulated consequences) isn't something that's likely to alarm the general public and make it dramatically change its lifestyle.