Which gases contribute to the greenhouse effect?
Which results from an increase in the greenhouse effect?
Which water source may become polluted as it travels over land?
Which is a sustainable practice?
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 is a consequence of global warming?
As the human population grows, what happens to our natural-resource requirements?
Which type of pollution includes CFCs and smog?
A factory is emitting large amounts of CFCs into the atmosphere. How might this affect people?
Why are invasive species dangerous to the environment?
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