You don't need to understand much of what goes under the hood of your car to draw simple conclusions like "exerting pressure on the brakes slows it down".

You do need considerable understanding of how cars work if what you want is to interfere with the engine functions to, say, increase its mileage.

We do understand enough to point to CO2 emissions as the probable cause of global warming (the less heat we radiate back to space, the warmer we get - it's that simple) but to manipulate the climate to a given objective while avoiding uncontrollable side effects would require a much better understanding of how the climate really works.

As Mark Twain cleverly said, it's not what you don't know that kills you. It's what you are absolutely sure that just isn't that way. Would you take that gamble?