It has been observed that forest fires can produce up to 40 percent of the mean annual global emissions of which of the following gases? A. nitrogenB. carbon dioxideC. oxygenD. All of these

Answer: Carbon dioxide

Explanation: During forest fires, a large amount of Carbon dioxide and greenhouse gases are released into the air with Carbon dioxide being the major emission gas. Thus it can produce up to 40 percent of mean annual global emission