15. A lot is known about how ancient Egyptians used astronomy.
a. True
b. False

Hydrologist meteorologistgeologist

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Ithink the answer to that would be b):

Answer erosion,oil spills,pollution,tourism,urban development;