Many people that I talk to about the climate are unaware that the earth has had numerous ice ages that last about 100,000 years, followed by an interglacial period of 15,000 years or so. And the current interglacial is getting near the end by historical standards. It is clear that an ice age is catastrophic to mankind, but mild warming actually is beneficial. Considering this it is hard to figure out why governments in the world want to make the world colder. It is also hard to figure out why they think they can have much impact anyway. Here is an article about ice ages.