Water moves through watersheds to rivers, lakes, and eventually oceans. Wetlands cannot filter pollution from freshwater systems.
Pollution can move into underground aquifers used for drinking water.
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Ocean pollution is less harmful because it is mixed with a lot of water.
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Ocean salinity is the same in all locations.

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?