The correct answer is D. Hydrogen.
Greenhouse gases are gases that trap heat in the atmosphere, causing the planet to warm. The main greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
Water vapor is the most abundant greenhouse gas in the atmosphere, but it is not the most important contributor to climate change. This is because water vapor is a short-lived gas, meaning that it does not stay in the atmosphere for very long. Carbon dioxide, on the other hand, is a long-lived gas, meaning that it can stay in the atmosphere for hundreds or even thousands of years.
Carbon dioxide is the second most abundant greenhouse gas in the atmosphere, and it is the most important contributor to climate change. This is because carbon dioxide is released into the atmosphere when fossil fuels are burned. Fossil fuels include coal, oil, and natural gas.
Methane is the third most abundant greenhouse gas in the atmosphere. It is released into the atmosphere from a variety of sources, including natural gas production, landfills, and agriculture.
Nitrous oxide is the fourth most abundant greenhouse gas in the atmosphere. It is released into the atmosphere from a variety of sources, including agriculture, fossil fuel combustion, and industrial processes.
Ozone is a greenhouse gas that is found in the stratosphere. The stratosphere is the layer of the atmosphere that is located above the troposphere. The troposphere is the layer of the atmosphere that is closest to the Earth’s surface.
Hydrogen is not a greenhouse gas. This is because hydrogen is a light gas that escapes from the atmosphere very quickly.