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Who is the author of A Sandy County Almanac?

The majority of Earth is covered by _________.

A _____________ is an organism that lives in or on another organism causing the other species harm.

This viewpoint is based on nature having value for just being nature.

This international environmental agreement was formed to reduce greenhouse gas emissions.

Coal is mostly nitrogen, but it also contains small percentages of impurities.

Environmental systems can either be open or closed. Which best describes an open environmental system?

____is an example of an r-selected species.

Rapid climate change is due to

Cannibalism usually _____________ when food is in short supply and the density of individuals in the population increases.