A simple and beautiful explanation of the science of global warming by Dr. Carl Sagan.
This is 40 years old and as relevant today as it was then.
Discussion
He was a superb communicator.
Fucking legend
except its flawed on its face.
it claims sunlight passes through the air unimpeded in one direction,
and then is magically blocked in the other direction by gasses that were already present, and should have prevented entry.
Its non-synergetic, isolatory western thinking.