Explain how fossil fuel use in the US makes us vulnerable to the demands of foreign countries.
Cyanobacteria have been genetically modified to produce _______.
Explain how humans react and adapt to the limited availability of water.
Distinguish between the fossils of ice age mammals found in the La Brea Tar Pits and the organisms that make up the fossil fuels of the tar.
The US consumes almost _______ of timber annually.
Explain the difference between actual and potential resources and why the distinction is important. Do the same for renewable and nonrenewable resources.
If the US modifies techniques for timber management, it is expected that US forests will _______.
Explain how fossil fuels originated, and why this process results in them being considered nonrenewable resources.
Which of the following is an example of a natural resource?
Which of the following best explains why air is considered a natural resource?
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