Which of the following is not a current theory regarding global climate change?
a. global warming will stimulate crop growth.
b. even the moderate projections on global warming will cause devastation.
c. higher levels of carbon dioxide in the atmosphere will have no effect.
d. sea levels will rise as a result of global warming.

The correct answer is: c. Higher levels of carbon dioxide in the atmosphere will have no effect.

The carbon dioxide, accompanied by the methane, is the gas that contributes the most into the formation of the Greenhouse effect. The atmosphere is getting warmer when it has bigger amount of carbon dioxide in it because it is a gas that manages to trap the heat in the Earth's atmosphere, instead of letting it go out of it.

Because of the increased levels of carbon dioxide, the temperatures will rise globally, the ice on the poles will melt, the sea levels will rise, and it will have devastating effects on everyone and everything.

Global warming refers to the recent and ongoing rise in global average temperature near Earth's surface. It is caused mostly by increasing concentrations of greenhouse gases in the atmosphere. Global warming is causing climate patterns to change

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

the correct answer is c