The two greenhouse gases that are at an all-time high are carbon dioxide (CO₂) and methane (CH₄). These gases have been increasing due to human activities such as fossil fuel combustion, deforestation, and agricultural practices. Oxygen (O₂) is not a greenhouse gas and does not contribute to the greenhouse effect.
What are the two greenhouse gasses that are at an all time high?
carbon dioxide
oxygen
methane
1 answer