Answer: Air pollution is responsible for seven million deaths each year in the US
Explanation: https://www.who.int/health-topics/air-pollution#:~:text=The%20combined%20effects%20of%20ambient,cancer%20and%20acute%20respiratory%20infections.
Carbon is relatively small. non - bulky atom that shares electrons easily .
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The sun because of photosynthesis in plants, then herbivores who eat plants then the carnivores who eat the herbivores who ate the plants.