What might happen to gas and oil production? how might alternative fuels provide a solution?

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !