@Maddus Mattus: Remember that the Greenhouse Effect is already in motion: biological systems produce Carbon Dioxide, Methane, Oxygen, etc.. as a side effect of living. The current mean temperature of our lovely planet remains relatively constant in a large part by the slowing down of the escape of heat from the planet's surface - and the greenhouse gasses we living things make help ensure a greenhouse shield remains in place.
Nobody can argue that too much of a good thing is guaranteed not to turn into a bad thing when it grows in an uncontrolled way (too much in, not enough out). So, too many cars, too many fossil fuel power plants, too much livestock, etc... will result in a thicker heat shield over time (too much in, not enough out) which means more heat is trapped causing the mean temperature of the surface of the planet to increase. What happens next is somewhat obvious, but science is an imperfect science. That said, if mathematical models operating on empirical data tells us something, it tells us that the path forward will be increasingly warmer for those of us living on the planet's surface (so, life).