Man made causes and Natural causes

There are natural causes and man made causes to global warming for instance methane released from the arctic tundra and from aquatic storages in the ocean.But in my opinion i think that the man made causes do the most damage to the environment because we use methane, coal, oil, and other fossil fuels at alarming rates.Also when we dig up these fossil fuels we release methane in the process.With a increased population it also hurts the planet causing co2 gas to enter our atmosphere even more.