Here's an experiment you can try for yourself disproving global warming;
Aim a regular light at a desk. Now try with a mirror to make the spot brighter then it already is by reflecting it's rays back.
Because the mirror will light up the same as the spot on the table, therefore no flow will go from the mirror to the desk. You require a brighter spot on the mirror then on the desk.
This is precisely what climate scientists claim. Sunlight is converted by the earth into long wave radiation and this radiation is being reflected by the CO2 back to the planet, causing additional warming, which gets reemitted, and on and on, till you have a runaway greenhouse effect.
LOLWUT? Infrared radiation is what's prevented from escaping the atmosphere by greenhouse gases--not visible light. Infrared light is not visible. Did they teach you that in your science class?