overpopulation - too many of the same organism in one area, native species - type of organisms that normally live in a particular ecosystem, invasive species - organisms that entered a new ecosystem and multiplied, hurting native species and their habitats, restore (restoration) - the way in which humans can help to take care of the environment, deforestation (clear cutting) - trees are cut down in large numbers to clear the land; this can lead to erosion and loss of soil, impact - an effect or result, alter - to change or modify, disrupt - to disturb or cause damage, thrive - to grow and survive, habitat - Place where an organism lives, organisms' home, overgraze - problem that occurs when grazing animals like cattle and sheep eat too much vegetation (grass), global warming - An increase in the average temperature of the earth's atmosphere,

5.9C Changes to Ecosystems

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