Takes a look at some of the effects on the nitrogen cycle, present scientific research, and discusses ways that the problems might be addressed in the future.
Examines rising sea levels and how human populations are contributing to this rise. Also includes research and approaches for coping with the changes that increasing sea levels may bring.
Examines trends on glaciers in Antarctica and the rest of the world, explaining how scientists can foresee the effects of global warming and predict future climate changes.
Looks at the growing risks to the Earth's forests from logging, burning, clearing, and droughts and discusses the effects of these threats on forest resources.
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