C. The area of the US doubled
The depletion of the natural assets by the humans has resulted only in negative effects. As natural assets we can take the water, forests, grasslands, oil etc. With the depletion of these natural assets, the humans have managed to cause incredibly high damage to the natural cycles, to the environment, to the species. The water for example is crucial for the survival of any organism, but the humans don't seem to take that in consideration, so the water is overused, and lot of species end up dead. Also, the extraction of groundwater causes the land to be unstable, as big gap opens up below the surface, so the surface layers often crumble. The extraction of oil uses methods that directly kill off and badly injure any living organism nearby. The forests and grasslands have been converted to agricultural landscapes, so lot of species went extinct or are endangered because they have lost their habitats.
Answer:
Neither
Explanation:
They are formed by glacial sands deposited on plateaus high above the shore. The Sleeping Bear Dunes are an easily accessible, beautiful example of this type of dune.
Answer:
B. local water contamination
D. destruction of ecosystems
Explanation:
The mining, be it a surface one or underground one, has several negative impacts on the surrounding area. Two common negative impacts of both types of mining are contamination of the local waters, as well as the destruction of ecosystems.
The waters get heavily polluted with toxic chemicals pretty much always ad everywhere where there is mining. The main reason for this is that the nus-products from the mining are released into the waters. This causes high level pollution of the waters, thus making it not good for anything, and the aquatic life in the waters dies out rapidly.
The fact that the waters are heavily polluted means that everything that comes in touch with them becomes heavily polluted as well. Also, apart from releasing chemicals in the waters, the mining requires space, so the area is cleared out, and after that lot of toxic material is disposed on it. The majority of the plants can sustain that, so they die out, and since they are the basis of the ecosystems, the animals die out as well.
