Answer:
apartheid - racial segregation
colonization - the taking control of an area by a foreign government
corruption - dishonesty, openness to bribery
desalinization - salt removal
desertification - a change that makes a place drier
globalization - the integration of world economies or cultures
By siltation, as part of the bed load
Because, if there's no summer the seasons won't be completed.
I'm pretty sure it's railroads, because there's not that many highways in Siberia, the rivers would be frozen over, and there's not a ton of people in Siberia. I'm sorry if I'm wrong.
Answer:
They release Carbon Dioxide (CO 2)