1. which of the below is an example of high-quality matter found near the earth's surface?
a. natural gas
b. mine tailings
c. bauxite (al ore)
d. recyclable materials in a landfill
e. nitrogen gas in the atmosphere
1 answer
well, I guess natural gas is higher quality than most of what you find in a landfill :) It all depends on their definition of "near" the surface though.
0 answers