Answer:
No se sabe muy bien, pero parece que de forma conocida, el carbón mineral empezó a utilizarse como combustible en China, hace unos 2000 años. También se dice que los ingleses conocieron su uso por aquella época y que de ellos aprendieron los romanos. El antiguo mundo no conoció, o no utilizó, el carbón mineral.
In the united states, almost two-thirds of all liquid hazardous wastes are injected into deep disposal wells.
Hazardous waste is waste that has substantial or potential threats to public health or the environment. Hazardous waste is a type of dangerous goods.
They usually have one or more of the following hazardous traits: ignitability, reactivity, corrosivity, toxicity Listed hazardous wastes are materials specifically listed by regulatory authorities as hazardous wastes which are from non-specific sources, specific sources, or discarded chemical products.
Hazardous wastes may be found in different physical states such as gaseous, liquids, or solids.
A hazardous waste is a special type of waste because it cannot be disposed of by common means like other by-products of our everyday lives.
Depending on the physical state of the waste, treatment and solidification processes might be required.
Learn more about hazardous waste here:
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Answer: (sorry I need to get free answers ad free)
Explanation:
Answer:
D. Algeria and Egypt
Explanation:
North Africa is generally the area above the Sahara belt in Africa. Most of the countries are Arab nations.
These countries are Egypt, Libya, Morrocco, Algeria, Tunisia e.t.c
- The best choice here is Algeria and Egypt
- The Pharaohs of Egypt are a dominant force in the global soccer scene.
- Egypt has qualified for the world cup 3 times.
- Algeria has featured in a record of 4 world cups
- Their national team is known as desert foxes.