How are farmers that use no-plow farming methods able to improve air quality for the people around the farm?
A. No-plow farming reduces the amount of dust in the air.
B. No-plow farming reduces the ozone levels in the atmosphere.
C. No-plow farming reduces the amount of pollen in the air.
D. No-plow farming reduces the formation of acid rain.

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.