Which factors make it hard for eastern europe to improve the quality of its water?

Why does a tidal bulge occurs on opposote sides of earth

Asap will mark geography final plz ! what are the benefits of international aid? (give me the right evidence )

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.