We don't actually "destroy CO2". We reduce the amount we put into the atmosphere. CO2 is great for plants to a certain point. The raising CO2 in the atmosphere means that the plants aren't absorbing it fast enough, and it also has an unfortunate feedback look effect. Plants can't survive in a climate that's too hot. So less plants means less CO2 absorbed, which means even more CO2 in the atmosphere. Plants also don't fully hold on to CO2. They absorb a lot, then when they die they release some. If they are burned then they release a lot more.
Then there's also the fact that 70% of the oxygen is produced by plant and other life in the oceans. With ocean acification from the CO2 increase, that life in the ocean is dropping as well which makes it harder to absorb CO2 and harder to produce oxygen.
Simple question, complex answer.
That's a bit mixed. We primarily act on behalf of the climatologists and other earth scientists. There are still some scientists who say that anthropogenic climate change is a myth, but there's very few of them and they are almost all employed or funded by fossil fuel companies.
The most recent and most comprehensive analysis on the scientific consensus on climate change has nearly 100% climatologists agree that humans are having a very large impact.
There has actually been a huge change and it's accelerating very fast
Earth's surface temperature has risen about 2 degrees Fahrenheit since the start of the NOAA record in 1850. It may seem like a small change, but it's a tremendous increase in stored heat.
www.climate.gov
Definitely good to focus on. Look at any scientist that disagrees on anthropogenic climate change, then look who funds them.
.