Niformitarianism is the assumption that the same natural laws and processes<span> that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe. It refers to invariance in the metaphysical principles underpinning </span>science<span>, .... </span>Modern geologists do<span> not apply uniformitarianism in the same way as Lyell.</span>
The answer is the second
one.
Deforestation of rain and forests and other parts of the world volcanic eruptions and widespread forest fires.
This activity has contributed greatest amount of carbon dioxide into the atmosphere over the past 100 years.