so that means that probably about half, maybe half of that nine-tenths of the degree of total warming might be caused by greenhouse gases.
so that means that probably about half, maybe half of that nine-tenths of the degree of total warming might be caused by greenhouse gases.
global warming:55
before the industrial revolution, naturally occurring amounts of greenhouse gases caused the air near the surface to be warmer by about 33 °c (59 °f) than it would be in their absence.