What is the major cause of the greenhouse effect.

A. soot from coal plants in the atmosphere

B. carbon dioxide in the water

C. carbon dioxide in the atmosphere

D. soot from coal plants in the water

C. carbon dioxide in the atmosphere

The major cause of the greenhouse effect is the presence of carbon dioxide (CO2) in the atmosphere. Therefore, the correct answer is C. carbon dioxide in the atmosphere.

The correct answer is C. Carbon dioxide in the atmosphere.

To determine the major cause of the greenhouse effect, we first need to understand what the greenhouse effect is. The greenhouse effect refers to the phenomenon through which certain gases in the Earth's atmosphere trap the heat radiated by the Earth's surface, causing a warming effect. This is essential for maintaining the Earth's temperature at a habitable level.

Now, let's analyze the given options to identify the major cause:

A. Soot from coal plants in the atmosphere: While soot particles can contribute to air pollution and have adverse effects on human health and the environment, they do not directly cause the greenhouse effect. Therefore, this option is incorrect.

B. Carbon dioxide in the water: While carbon dioxide dissolves in water and can affect the acidity of oceans, it is not the major cause of the greenhouse effect. Carbon dioxide primarily exists in the atmosphere and contributes significantly to the greenhouse effect. Therefore, this option is incorrect.

C. Carbon dioxide in the atmosphere: This is the correct answer. Carbon dioxide is one of the main greenhouse gases, along with methane, nitrous oxide, and others, that is responsible for trapping heat in the Earth's atmosphere. It is primarily released into the atmosphere through human activities such as burning fossil fuels (like coal, oil, and natural gas) and deforestation.

D. Soot from coal plants in the water: Soot particles in water can have detrimental effects on aquatic ecosystems; however, these particles do not directly contribute to the greenhouse effect. Therefore, this option is incorrect.

In conclusion, the major cause of the greenhouse effect is carbon dioxide in the atmosphere. It is important to reduce carbon dioxide emissions to mitigate the negative impacts of climate change associated with the greenhouse effect.