Have we caused Global Warming

CO2 makes up only about 0.04% of the atmosphere. Humans produce only a very small proportion of this tiny amount, so why are we being blamed for global warming?
The fact is that we are being scared by the people that have money invested in making money from it.

Going green has really helped Sri Lanka to have the curren catastrophic crisis.

Why do the world leaders give so much credence to a 16 year old schoolgirl who stopped going to school and has no grasp of the facts.

A consensus that it is all our fault means nothing, it's not scientific fact. The consensus was once that the earth was flat.