What Are Natural Resources? practice

It is expected that US forests will _______. a. not be able to meet long term timber needs b. be able to meet long term timber needs c. result in deforestation d. provide increasingly cheaper timber

B.

The US consumes almost _______ of timber annually. a. 5 million cubic feet b. 20 billion cubic feet c. 40 billion cubic yards d. 30 million cubic yards

B.

Which of the following best explains why air is considered a natural resource? a. Air is expensive to produce and keep clean. b. Air is a raw material for biological processes supplied by the Earth. c. Air can be processed to generate expensive chemicals. d. None of the above

B.

Cyanobacteria have been genetically modified to produce _______. a. oil b. natural gas c. isobutanol d. none of the above

C.

Which of the following is an example of a natural resource? a. water b. ice c. oxygen d. all of the above

D.