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Human Impacts on the Environment

point source pollution where the exact origin of the problem can be specifically defined, as a particular smokestack or pipe, for example.
nonpoint source pollution that comes from many sources, often spread by wind or water to a wide area.
pollutant any substance or condition that makes the environment less suitable for living things.
eutrophication problem in which too many nutrients are added to a body of water, causing an algal bloom that leads to a lack of oxygen in the water
biomagnification problem in which a toxin builds up as it moves through trophic levels, resulting in severe problems for the top consumers
overexploitation problem in which humans harvest too many of a particular species, leaving the population unable to recover
extinct describes a species that no longer exists
endangered describes a species that is likely to become extinct if the current trend continues
fragmentation habitat loss caused when humans divide habitat into disconnected areas that are too small to support some species
degradation habitat loss caused when humans change the environment so that it is no longer fit for living things
Created by: Jennifer_Clough