One of the major problems associated with long-term, high-level nuclear waste storage is
A) selecting an environment that will remain stable for more than 10,000 years.
B) determining a cost-effective way to shoot waste into space.
C) figuring out how to contain the material so that it does not leak into the ocean.
D) creating a secure environment to protect the material from terrorists.
Question 2
Some farmers in the Midwest rotate their crops from year to year, switching from soybeans to corn on the same fields. What is one of the advantages of doing this?
A) Soybeans add large amounts of carbon dioxide to the soil, which helps the corn crop.
B) Both crops require the same fertilizing supplies, so farmers save by buying fertilizer in bulk.
C) Corn adds large amounts of phosphorus to the soil, which helps the soybean crop.
D) The corn crop benefits from reactive nitrogen fixed and added to the soil by the soybean crop.
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