My father collects Popular Mechanics and has some old volumes of 1950´s and there is an article about a possible future ozone hole caused by spray cans, so the people knew that and nobody did something to avoid it.

The climate in the planet is changing more fast than it used to do, but we dont see it because we expect to see hurricanes or big earthquakes in our backyard, but if you pay attention you will see the changes, here on Mexico we had our first in history twister A twister!!!! killed 2 or 3 people I think (before to go to cross the frontier). A twister in America only on USA but not so low near of the Ecuatorial line.