Greenhouse effect is caused by A. Nitrogen B. Carbon dioxide C. Carbon monoxide D. Nitrogen dioxide

The correct answer is: B. Carbon dioxide

Carbon dioxide is a greenhouse gas that traps heat in the atmosphere, causing the planet to warm. The other options are not greenhouse gases.

• Nitrogen is an inert gas that does not trap heat.
• Carbon monoxide is a poisonous gas that is not a greenhouse gas.
• Nitrogen dioxide is a greenhouse gas, but it is not as important as carbon dioxide in causing climate change.

Greenhouse gases are gases that trap heat in the atmosphere. This heat is what keeps the Earth warm enough to support life. However, human activities are increasing the amount of greenhouse gases in the

atmosphere, which is causing the Earth to warm at an alarming rate. This warming is causing a number of problems, including rising sea levels, more extreme weather events, and changes in plant and animal life.

We can reduce the amount of greenhouse gases in the atmosphere by using less energy, driving less, and eating less meat. We can also support policies that promote renewable energy and energy efficiency.