Which is the most abundant greenhouse gas in Earth's atmosphere?

Question

Quizplus · Accepted Answer

Water vapor is the most abundant greenhouse gas in Earth's atmosphere, making up approximately 80% of all greenhouse gases. However, it is considered a feedback mechanism rather than a driver of climate change, as its concentration depends on temperature and other factors. Carbon dioxide, while present in much lower concentrations, is a significant driver of climate change due to human activities such as the burning of fossil fuels.

Which Is the Most Abundant Greenhouse Gas in Earth's Atmosphere