What is the greenhouse effect? the warming of a planet due to trapped radiation. the heating of a solid, such as a rock. the cooling of earth due to air pollution.

not too sure but maybe in the hot springs.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.