Why is it commonly believed that carbon dioxide is responsible for global warming? select 2 options. carbon dioxide levels in the earth’s atmosphere have been steadily decreasing. carbon dioxide levels in the earth’s atmosphere have been steadily increasing. carbon has a longer average lifetime in the atmosphere. carbon has a shorter average lifetime in the atmosphere. other greenhouse gases amplify the effect of carbon dioxide.

Option B and D are correct as the Carbon dioxide levels in the Earth’s atmosphere have been steadily increasing and other greenhouse gases amplify the effect of carbon dioxide.

Explanation:

As we all are aware that increasing rate of carbon dioxide is responsible for global warming. Scientists note that the average temperature on Earth is increasing over time. They believe that a contributing factor is the greenhouse effect.  

This effect is caused by the formation of greenhouse gases, such as methane, water vapor, and carbon dioxide. Increasing the amount of greenhouse gases in the atmosphere is considered to be the cause of global warming and climate change. Water vapor, carbon dioxide, methane, nitrous oxide and ozone are main green house gases.  

Carbon dioxide is steadily increasing in the atmosphere over hundreds of years and it has a longer life span than most of the gases.

Option B and C

Carbon dioxide is the most prominent greenhouse gas of atmosphere. It is very much responsible for increasing the temperature of Earth's surface by capturing the long wave infrared lights emitted by Earth's surface.

Due to industrial revolution, various natural calamities and huge increase in population over the last few centuries, amount of carbon dioxide is increasing in atmosphere significantly. And the half life of carbon dioxide in atmosphere is around 200 years which is much more than other significant greenhouse gases. This leads to the significant contribution of carbon dioxide to greenhouse effect.