These problems are likely caused by urbanization (pick the right ones):
air pollution
declining birth rate
forest overgrowth
housing shortage
sovercrowding
volcanic eruptions
water pollution
water shortages

What is the "great pacific garbage patch"? (a) a large area of marine debris concentrated by rotating ocean currents (b) a large area around the pacific rim where debris collects from natural disasters such as tsunamis (c) an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability (d) a large trash dump located in hawaii

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics

What was the great rift valley formed by