A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely outcome of such an event?
Which water source may become polluted as it travels over land?
Scientists predict that we will eventually use up all available fossil fuels. Which list includes only fossil fuels?
Which is a renewable resource?
Which gases contribute to the greenhouse effect?
As the human population grows, what happens to our natural-resource requirements?
Which is a nonrenewable resource?
Which type of pollution includes CFCs and smog?
Which results from an increase in the greenhouse effect?
A factory is emitting large amounts of CFCs into the atmosphere. How might this affect people?
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