Yes climate change is happening, has happened, what you are not saying is the rate at which the climate is changing. That is alarming!
Warmer air holds more water vapour (moisture), hence lately more larger hurricanes, more rain, bigger snow storms, bigger floods in areas considered to be in the flood range of "every 100 years" . Floods wipe out the soil underneath, so if you want to grow crops, you need soil... Although there are studies that have shown you can grow plants without soil, it still takes water to grow plants. Early last century some people came up with a grain that could use reduced water, nothing since then that I have heard means they can grow barley with less water. So you climate negators pls don't complain when the insurance company increases your home insurance (yeah that has already happened the insurance companies raised you insurance after the Calgary Floods)
https://inspectapedia.com/hazmat/Carbon_Dioxide_Hazards.php This chart on this page tells you the toxicity of CO2.
Right now with the hockey stick graph, CO2 limits are increasing at an increasing rate. So as we humans are cutting down trees in the Amazon (trees which can convert the CO2 back into O2), we have a decreasing change of CO2 to O2. Humans are still putting CO2 into the atmosphere faster than it can be turned back into O2. Studies have shown that it takes mature trees to accomplish this, humans have a habit of cutting the tree just as it matures (50 to 70 years depending on species).
So as CO2 increases the O2 will decrease in the atmosphere. Any studies on how that affects the human body? The CO2 is a greenhouse gas that is helping to warm the temperature of the earth's atmosphere..... So far I think the average temp has gone up 1 degree. How much more water vapour can the air hold with another 1 degree rise in temp? More and more flooding will happen and bigger storms like hurricanes and winter snow storms....
Read the reference, it tells you how toxic CO2 can be at certain levels.... Ever feel drowsy in a lecture room, could be poor air quality/rise in CO2 in a room. But then again people will only see the facts they want to believe....