What chemical substance is used to power cellular activities?

Why should the united state be concerned about air pollution in china?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil