Question

which is the heaviest gas in our environment???​

Answer 1

Answer:

Carbon dioxide is crucial to plant life. Carbon dioxide composes only about 0.03% of the atmosphere. Oxygen is about 21% of our atmosphere. The vast bulk of our atmosphere is made up of nitrogen (78%).

Explanation:

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Answer 2

Answer:

Atmospheric levels of carbon dioxide—the most dangerous and prevalent greenhouse gas—are at the highest levels ever recorded.