Let’s assume the earth’s atmosphere was a 6 ounce cup of tea. And let’s say we used a teaspoon of warmer water to measure in the last of the 6 ounces of tea and to heat it up. This teaspoon is the CO2 portion of the total green house effect.
Clearly the teaspoon’s worth of water would not change the temperature of the 6 ounces of tea much at all. That teaspoon is roughly 3.6% of 6 ounces, which is the C02 component (3.6%) of the greenhouse effect which is dominated by water vapor. But as the SCIENCE points out, humankind’s activities only account for 3.2 percent of the teaspoon. Since a teaspoon is equal to 5 ml, then mankind’s effect is like trying to put 0.16 ml into the 6 ounces of tea. If you have a medicine dropper in your house with tenths of a ml measurements you can visually compare man’s effect on climate with your 6 ounces of tea. That should help Caprio get his ‘mind around’ this siuation. Try it out. Try and cool of the tea or heat it up. I doubt you have a temperature measuring device that could detect the difference in temperature from .16 ml.
For reference, a drop of water is about .2 ml. Amazing what a sense of proportion can do, eh?