Weegy: Hydrothermal metamorphism is caused by a large-scale geological event
User: Of these four, which is most likely to be found in a park with a fossil in it? a pumice b gneiss c sandstone d granite?
Weegy: c Sandstone
User: does oil release more toxins than coal?
Weegy: Coal releases more toxins than natural gas.
Throughout its life cycle, coal releases mercury, arsenic, thallium, barium, lead, and a host of other toxic heavy metals into the air and groundwater. [ These are toxins that are not associated with natural gas.
In addition, burning coal releases more toxic gasses than any other fuel known to man:
For each MWh of electricity generated,
Coal releases 2249lbs CO2, 13lbs SO2, 6lbs NOx
Gas releases 1135lbs CO2, 0.1lbs SO2, 1.7lbs NOx
Oil releases 1672lbs CO2, 12lbs SO2, 4lbs NOx
In fact, natural gas is much, much cleaner than coal. SO2 is a controlled pollutant that causes acid rain, and NOx forms a number of toxins, which are responsible for a host of health issues, from asthma to stroke, to heart failure.
Although coal has reduced its toxic output in recent years, it started with more than all other fuels, and has reduced its emissions less than all other fuels. For instance, from 2004-2008, the following percent reductions in power plant emissions took place: ]
User: does oil have to be mined from underground?
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