Im not sure but B or c. Im sorry
Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Answer:
Positive, Positive, Positive, Positive, Negative, Positive, Positive, (2) is answer to 22.
Explanation:
Because all those answers are correct.
Answer:
This question makes no sense
Explanation:
Answer:
Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment. Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface.
Explanation:
Hope that helps:)
