Answer: E. Is produced by "fracking", which uses high-pressure water and chemicals to make new "fractures" in the shale that allow the gas to escape to wells.
Explanation:
The Marcellus is a large area in the eastern part of the USA. Natural gas is extracted here through fracking or hydraulic fracturing. This is a process in which water at high pressure is injected into a drilled holes thereby creating holes in the rocks housing the gas and petroleum and sending them into a well
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While fracking provides natural gas, a cleaner source of energy than coal, fracking has some environmental costs such as ground water contamination and the risk of setting off earthquakes.
When the rocks are exposed, erosion begins
they're different biomes because if you travel way back to the prehistoric times our ancestors were once there
The tropics would expand.
Explanation:
With the global temperatures rising the Earth is projected to have multiple changes, climatic ones and even in the shape of the landmasses. Because of the rising global temperatures the ice at the poles is expected to melt, if not all than in solid amount, which in turn will rise the sea level.
Higher sea level will mean that there will be less land mass, but also that the land mass will be under bigger maritime influence when it comes to the climate. The ocean currents also are expected to gradually become dominated by warm ocean currents, while the cold ones will be much less and with much lesser global influence. That will cause expansion of the tropics, mostly toward north, as toward south there is little land mass, and such expansion will totally change the landscape, the habitats, the diversity and type of species present in certain areas.
