Salinization and desertification
This is due to the amount of infrastructure in the city. All that metal holds heat making inside the city hotter than outside the city.
Caspian Sea is what I got
Answer:
The Nile River
Explanation:
The Nile River is more than 4,000 miles long and is considered to be the longest river in the world. It runs through many countries in northeastern Africa.
The answer to your question is C ! :)