The government is the only entity with enough money to mount a serious effort. Sometimes you have to 'give the devil his due'.
Not true,
and
not true ever.
Jesus does say that without Him we can do nothing > John 15:5. So, yes worldly government people can potentially make things worse, while thinking they are doing things to make things better. Humans in general can do this.
Even so > Romans 13 talks about how God is able to use secular people for His good. And we see this happened, when God used Pharaoh to put Joseph in position to save many people's lives.
So, yes humans can mess up what they try to rescue, but God can use such people as He pleases when He pleases
My opinion is that humans can in different ways mess up the air. Ones do smog out whole cities. Oh, and by the way, when a volcano erupts, its soot for a while can hang in the air along airplane routes, and its fine particles can wear away the parts of passenger jet engines; so pilots are redirected around areas where there have been volcanic eruptions. This shows that in selected areas, yes the air can be changed.
So, on the overall, I would say things can add up to effect the whole atmosphere.
And I was told that space shuttles going through the ozone layer have altered it so it does not filter out the sun's rays, so well like it used to do. And so there can be more intense sun ray contact on earth, because of the thinning out of the atmospheric filter. I see how this can be a reduced version of how there is no atmosphere, at all, on the moon. On the moon, you can fry an egg on the lit side of the moon, while inches away on the dark side you can freeze the egg . . . something like this. From one side of the line to the other, there is a sharp temperature difference because there is no air to blend the temperatures from the dark side to the lit side.
So . . . if here on earth we have an area where the sun shines through with less filtering, the air filter is thinner so . . . I can see . . . the temperature difference between shaded and lit areas, or night and day, can be more sharply different than if the air was thicker to balance the dark and light temperatures more. And because the warmer and colder areas are more sharply imbalanced, there can be more intense rushing of cold under the warmer air, causing more storms.
So, this would not be because of only temperature changes, but because of more sharp temperature differences between darker and more lit areas.
But would this be global . . . or mainly under where the shuttles fly through?