A. Personal safety, pollution, and extreme temperatures
Answer:
the answer to this question is C. Skin cancer
Explanation:
A more likely outcome of putting carcinogens in the air would be the development of skin cancer
Carcinogens may increase the risk of cancer by altering cellular metabolism or damaging DNA directly in cells, which interferes with biological processes, and induces the uncontrolled, malignant division, ultimately leading to the formation of tumors.
Hence the answer is C.
STDs are infections spread from person to person during sexual contact.
To ensure they are there for posterity's sake.