B.
When fossil fuels are burned carbon dioxide is released in to the atmosphere
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Because it can cause serious infections in the lungs, blood and our brains...It may also cause urinary tract and infections in wounds.
Background extinction refers to the normal extinction rate. These are species that go extinct simply because not all life can be sustained on Earth and some species simply cannot survive. Mass extinction is a widespread event that wipes out the majority (over 50%) of living plants and animals.
Answer:
because bill stacy was sick.
Explanation:
I believe the answer is genome
