What is one effect that burning fossil fuel has on the atmosphere?

The correct answer is D. Increases levels of greenhouse gases

Explanation:

Fossil fuels include substances such as coal or petroleum that form naturally on Earth and are extracted by humans to be used as fuels. These substances include large amounts of carbon and other substances that are released when they are burned. Due to this, the burning of fossil fuels implies the production of carbon dioxide (CO2) that is an important greenhouse gas. This implies burning fossil fuels releases carbon dioxide that accumulates in the atmosphere and causes radiation from the sun to be trapped (greenhouse effect). Therefore, one effect of burning fossil fuel is that it increases levels of greenhouse gases as a result of the carbon dioxide released.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme