I'm old enough to remember the 70s scare about the coming ice age, which was being hastened IIRC by the use of aerosol sprays (because of the propellant used). Yes -- use hairspray or air freshener and you're bringing on the ice age! Aerosols disappeared for a while (replaced by mechanical pump type things), and then aerosols came back, I guess with a different propellant.
But hairspray and air freshener are really small potatoes compared with with the havoc you can wreak attacking the internal combustion engine and whole utilities!
The global cooling alarmism of the 70's led to the creation and massive funding of climate science. When the global cooling thing didn't pan out, these scientists were left with two options: 1-vouluntarily put themselves out of work by saying "nothing to worry about folks" or 2-keep themselves employed and expand their field of science by creating a new global warming hysteria.
No government financed scientist has ever voluntarily put himself out of work by admitting they are unneeded. They all create panic and postion themselves as saviors.
In grammar school in 1955 we were told that CO2 was a greenhouse gas and that eventually earth would be like Venus with the oceans dried up. We were also informed there was 20 years of oil left and since we were planning to have cars in a couple more years we were sent into immediate, permanent, and Great Depression.