How many tributaries does the nile river have?

Does the threat of global warming require international cooperation? why or why not?

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

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false