Anyone here let's ch. at na yrr...What is the impact of world war 2

Brainliest pls

Explanation:

World War II was, arguably, the most significant and influential event of the twentieth century. The devastation is almost incalculable: total military and civilian deaths are estimated at 70 to 85 million, about 3% of the global population during that time. World War II also saw the dawn of the nuclear age

the answer is:

carbon dioxide

i think the answer is b.