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The production for sulfidic zinc ores produces large amounts of sulfur dioxide and cadmium vapor. Smelter slag and other residues of process also contain significant amounts of heavy metals. About 1.1 million tonnes of metallic zinc and 130 thousand tonnes of lead were mined and smelted in the Belgian towns of La Calamine and Plombières between 1806 and 1882.[85] The dumps of the past mining operations leach significant amounts of zinc and cadmium, and, as a result, the sediments of the Geul River contain significant amounts of heavy metals.[85] About two thousand years ago emissions of zinc from mining and smelting totaled 10 thousand tonnes a year. After increasing 10-fold from 1850, zinc emissions peaked at 3.4 million tonnes per year in the 1980s and declined to 2.7 million tonnes in the 1990s, although a 2005 study of the Arctic troposphere found that the concentrations there did not reflect the decline. Anthropogenic and natural emissions occur at a ratio of 20 to 1.[86]
Levels of zinc in rivers flowing through industrial or mining areas can be as high as 20 ppm.[87] Effective sewage treatment greatly reduces this; treatment along the Rhine, for example, has decreased zinc levels to 50 ppb.[87] Concentrations of zinc as low as 2 ppm adversely affects the amount of oxygen that fish can carry in their blood.[88]
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How does the element gold affect the environment?
Gold don't affect the environment; but the the mercury or sodium (potassium) cyanide used for gold extraction are dangerous materials.
What is called the Ratio between oxygen uptake and oxygen usage?
ratio between oxygen usage to oxygen uptake is called as Oxygen extraction ratio
Why do you need water in the oxygen concentrator?
In a dry environment, the purpose of adding water to the oxygen concentrator is to moisturize the oxygen. Usually, we can add water or no water to the oxygensolve oxygen concentrator, this will not affect the use of the oxygen concentrator. It still needs to be confirmed with the store.
Do the personal choices that you make affect the environment?
They do affect the environment because, say that you start a wild fire it kills trees and tress give us oxygen also, it kill many animals and it could effect the food chain also.
What is a natural harbor and how does it affect the environment?
a natural harbour is natural so what would it do to affect the environment
How does the element gold affect the environment?
Gold don't affect the environment; but the the mercury or sodium (potassium) cyanide used for gold extraction are dangerous materials.
How does getting oxygen affect the environment?
yes
How does the affection on plants affect the environment?
they give oxygen to humans.
How does growing an apple orchard affect the environment?
produces nitrogen+ oxygen
What is the definition of oxygen extraction?
taking oxygen in from breathing
How does cutting down trees affect environment?
our air gets polluted. Oxygen decreases.
What is the word for the removal of oxygen from a compound?
extraction
How can the environment you live in affect you?
Well it helps because the oxygen that plants provide help you breath.
How does the extraction of granite affect the environment?
the gas and dust it gives off cause lots of problems to the lungs and that is probably in better terms called lung cancer
Can a upper tooth extraction effect sinus?
Yes, the extraction of an upper tooth can affect the sinuses.
Does the environment changes affect the breathing rate?
yes . . depending on availability of oxygen, breathing rate changes
The affects logging has on the environment?
Logging has a negative affect on the environment. This is because it releases greenhouse gases and destroys habitats. It also depletes oxygen production.
