Which greenhouse gas has an average lifetime in the atmosphere of a few weeks to thousands of years and is the largest contributor to climate change?

a) carbon dioxide

b) methane

c) nitrous oxide

D) fluorinated gas

What is the capital of Saudi Arabia?

The beginning of a tornado is called

Korean farmers use levees to separate and irrigate their rice fields The word underlined in the sentence above is best defined as A flat areas that are cut into the side of hills and used to grow crops B.

What is the approximate longitude of the most easterly boundary of the united states

What do geographers call areas whose residents share a common characteristic? A. economic spheres B. free-trade zones C. homogeneous D. regions

Conseqüências da guerra dos balcãs

What do you often find in sedimatary rocks?

Changes to the earth that can be explained by plate tectonics include all the following except ___ Earthquakes, erosion, mountain ranges, volcanoes

Iron: A. is forming today in the Great Lakes region as banded-iron formations (BIFs). B. is stronger and weighs less than aluminum. C. was the first of the common metals (iron, aluminum, and copper) to be used by humankind. D.

Glacier store about 70% of the worlds freshwater true or false