An unnatural temperature increase in the atmosphere near earth's surface is called?
a. acid precipitation
b. global warming
c. ozone accumulation
d. solar wind

The right option is; B. Global Warming

An unnatural temperature increase in the atmosphere near Earth's surface is called global warming.

Global warming is the observed prolonged rise in the average temperature of the earth's climate system. Global warming is an environmental problem that is observed by temperature measurements and by various influences of the warming. Global warming is caused by natural influences such as greenhouse gases, volcanic eruption, and human influences such as industrial revolution and deforestation.

i think the answer would be d

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.