Friends of the Earth say that "up to 24,000 people die every year as a result of air pollution." That is not much of a surprise when there are now around 500 million cars polluting the planet. The problem is that we can't live without cars, because they are part of our daily lives. But, from the ...

Final Exam Part 1 A. Provide a systematic definition of an ecosystem. Describe four of the examples of both "natural" and "human-made" ecosystems? Explain how a majority of human activities today are dangerous for natural ecosystems. Remember to connect these dange...