About one-third of the toxic metal, mercury (Hg), is released into the air from natural sources, such as rocks, soil, volcanoes, and the ocean. The remaining two-thirds comes from ____.

Answers

Answer 1

Answer:

Human activities

Explanation:

Anthropogenic activities account for the major sources of pollution of the environment. Various human activities contribute in no small way to environmental degradation.

Two-thirds of toxic metal, mercury (Hg) is released into the environment by human activities.

One of the human activities that release mercury into the environment is the extraction of metals such as sodium which requires an amalgam of sodium and mercury.

Mining and fossil fuel combustion also releases mercury in large quantities. This mercury so released leads to contamination of the environment.


Related Questions

A certain sample of limestone formed when shells from organisms were buried under layers of sediment and experienced pressure. A student classifies the sample as clastic sedimentary rock. What is one problem with this classification

Answers

Answer:

The problem with this classification is clastic sedimentary rocks are not formed with organic elements, that is, they do not form with the remains of organisms, such as shells, for example

Explanation:

The student made an incorrect classification. This is because he classified a rock formed from shells as clastic sedimentary rock.

Shells are organic materials, as they are the remains of living organisms. Organic material is not capable of forming clastic sedimentary rocks, as these rocks are formed only by sediments. Remains of organisms, manage to form a type of rock called organic rock.

What types of things are more common in the city than in a rural environment?
Check all that apply.
A. Organized crime
B. Travel by car
c. People talking more softly
D. Pollution

Answers

Answer:

A. Orgnaized Crime

D. Pollution

Explanation:

If a circle has a radius of 4. then the area of the circle is

Answers

Answer

16[tex]\pi[/tex] or 50.24 units

Explanation:

[tex]\pi[/tex][tex]r^{2}[/tex] and r is the radius, since we know what the radius is (r ) we can put this in to an expression

[tex]\pi[/tex] · 4² = 16 units

If the answer is not 16 then its 50.24 units

Explanation:

Now 16 is the correct answer but just in case I took this a step further.

If we estimate the area by using 3.14 which is ( [tex]\pi[/tex] ) because sometimes that isn't  natural to express the area using [tex]\pi[/tex]

I hope I helped you : )

Now that you understand what an invasive species is, do some research and find another invasive species and explain the questions below.

a. What is the invasive species?

b.What native species did it invade?

c.Where is the location?

Answers

The Burmese Python from South East Asia

The appearance of Burmese pythons has caused the population of raccoons, opossums, foxes and hares to drop.

The Burmese python is affecting the south eastern part of Florida, at Everglades

Answer: one type of invasive species is the Emerald Ash Borer.

Explanation:

This green beetle didn't invade a species, it invaded a ecosystem. It was originated from china, Japan, Taiwan, and other asian countries. this beetle destroys Ash trees in mostly Canada. scientists say that they were found in shipment boats travelling from Asia to North America. Now they stay in Ash Trees to protect themselves from the cold.

:)

How can discussions, projects, campaigns, and events support victims
of human trafficking.​

Answers

Answer:

by giving knowledge to each and every person about human traficking do camping about it

hii! i’ll give brainliest pls help

Answers

Answer:

B is correct

Explanation:

B is the correct answer explanation:Trees have a very small surface compared to walls, thus they oppose very little resistance to rushing waters and can survive a tsunami better than houses. However, a very strong tsunami will sweep aside trees and houses alike.

What type of map is this?!
a. Formal
b. Functional
c. Perceptual

Answers

Answer:

i believe it is A:formal

Explanation:

the answer would be A!

explain how a corrie is formed

Answers

here's your answer..

example of brain gain​

Answers

Answer:

example of brain drain are:

migration of educated people from their own country to another foreign countries.

Indicate whether the sentence or statement is true or false.

Arizona is the largest state, but it is the least populated.


Please select the best answer from the choices provided

T
F

Answers

False, pretty sure Texas is the largest state

An air mass that develops over land near the north pole will be?

a .warm and humid
b .cold and humid
c .warm and dry
d. cold and dry

Answers

The answer is A.warm and humid
It is option c: warm and dry

ocean centered geography explains culture ties because:

Answers

Oceans act as routes for travelers connecting different countries. In the past, this was vital to nations and travelers brought not only goods but culture to different countries.

1. How did conquering Mexico affect the Spanish? *

A. made them wealthy
B. changed government to monarchy
C. Aztec culture was erased
D. U.S. went to war with Spain

Answers

Answer: c

Explanation:

PLS SNSWERR is this!! IM SO SCARED. What bug is this? It’s was on my short

Answers

I think maybe it's ground beetles

Answer:

beetle

Explanation:

i guess

Nobody did the work [into passive voice]​

Answers

Answer:

The work was done by no one

Hope this helps :-)

Geography Lesson 1. Resources.
Importance of Sustainable Development Goals in Qatar
Content
Presentation:

Answers

idont no to this lesson but important development gaols in qatar content to skills

hii! i’ll give brainliest pls help

Answers

Answer:

landslide

Explanation:

if you look closely the mountain is falling which is called a landslide

Plss help i need help

The diagram below shows undisturbed fossils in sedimentary rocks in two different locations. (2 points)

The picture shows two layers of rocks. In location 1, the top layer has fossils of leaves, the middle layer has fossils of fish, and the bottom layer has fossils of sea shells. In location 2, the top layer has fossils of sea shells; the middle layer has fossils of fish, and the bottom layer has fossils of leaves.

Which of these conclusions is most likely correct about the locations?

A. Both the locations have dense forests.

B. Both the locations are submerged under water.

C. Location 1 is a forest at present and Location 2 was a forest in the past.

D. Location 2 is a forest at present and Location 1 was a forest in the past.

Answers

Answer:

B. Both the locations are submerged under water.

Explanation:

Location 1 is a forest at present and Location 2 was a forest in the past of these conclusions are most likely correct about the locations. The correct option is C.

What are fossils How do fossils form layer by layer?

When an organism dies and is buried for various causes, fossils typically form. The bodies or remnants of the organisms are then covered in layers of dirt, lava, ash, or sand. Due to various variables, such as pressure, these layers harden over time.

Location 1 had sea creatures living in its bottom layer, which indicates that it was once underwater. The middle layer has fossils of fish, which further supports the idea that it was submerged underwater. The top layer, which has fossils of leaves, suggests that it was a forest in the past and is above water level now.

Location 2 has sea shells in its top layer, suggesting that it was underwater in the past. The middle layer has fossils of fish, which further supports the idea that it was submerged underwater. The bottom layer, which has fossils of leaves, suggests that it was a forest in the past and is above water level now.

Thus, the ideal selection is option C.

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Describe the different tectonic provinces of the Southern Appalachians, including the different rocks found within them, where they originated, and how they were affected by tectonic collision. Also identify younger examples of these provinces in the Western U.S.

Answers

Answer:

There are several tectonic provinces collectively called as crystalline providences.

Explanation:

The geology of Appalachians consists of Blue Ridge, Piedmont, Adirondack, and the New England providences. They are known as Crystalline provinces. The sinking of the oceans continued about 270 million year ago due to which a huge mass of rocks was pushed westwards along the margins of North America and piled up to form the mountains. The Sierra Nevada is the youngest mountain range on the west coast of the United States.

What continent was part of rodinia and later made up North American Continent?

Answers

Answer:

Rodinia was a Neoproterozoic supercontinent that assembled 1.1–0.9 billion years ago and broke up 750–633 million years ago.

Explanation:

Valentine & Moores 1970 were probably the first to recognise a Precambrian supercontinent, which they named 'Pangaea I'.

Information:

In geology, a supercontinent is the assembly of most or all of Earth's continental blocks or cratons to form a single large landmass. However, some earth scientists use a different definition, "a grouping of formerly dispersed continents", which leaves room for interpretation and is easier to apply to Precambrian times. although at least about 75% of the continental crust then in existence has been proposed as a limit to separate supercontinents from other groupings

Tips:

Neoproterozoic supercontinent

Horizontal variations in air pressure cause a force which makes the wind blow. These pressure variations are caused by a. warm temperatures in the stratosphere b. non-circular shape of Earth c. uneven heating of the Earth's surface d. greenhouse effect e. Earth's rotation

Answers

Answer:

The pressure gradient causes the air to move horizontally, forcing the air directly from a region of high pressure to a region of low pressure. The Coriolis force, however, deflects the direction of the flow of the air (to the right in the Northern Hemisphere) and causes the air to flow parallel to the isobars.

Explanation:

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During which time period did large tropical swamps extend across North America, eventually becoming the vast coal deposits of eastern North America and Europe today

Answers

Answer:

The Carboniferous Period

Explanation:

Part of the Paleozoic Era, it's named because Carboniferous refers to all of the carbon in the swamps which turned to coal. 359-299 mya

PLEASE HELP!!! NO LINKS!!!
The pictures show two different mountains in the same geographical location. The mountains in Picture A are rough and jagged. The mountains in Picture B are smooth and rounded. Which statement about these mountains is probably true?

Answers

Answer

a.

Explanation

since it is more smooth and rounded it is probably older due to erosion

After analyzing both pictures, one can draw the conclusion that the mountain in 'Picture B' is smooth and rounded. Thus, the statement associated with picture 'B' is correct.

Why the mountain is smooth and round?

Mountains may undergo a variety of changes over time. They are susceptible to wind and rain erosion as well as landslides brought on by floods. Volcanic eruptions have altered certain mountains. They could also alter as a result of tectonic plate movement and earthquakes. Erosion alone is the cause. All juvenile mountain ranges are pointy, and as they get older, they become rounded.

Mountains rise rather quickly (a few millimetres each year) until the factors that created them cease to exist. They are being destroyed by the effects of erosion even as they are growing. These processes involve water in streams, ice in glaciers, and wind-blown sand chipping away at surfaces.

Therefore, the statement 'The mountains in Picture B are smooth and rounded' is correct.

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what is 1/2+3/4 as a fraction? Please Helppppp!!!!!!!

Answers

1/2=2/4 so you do 2/4+3/4=5/4
You have to make sure you do the same number for the denominator

why did the united states of America eatablish a long term military presence in west germany in world war 2​

Answers

The United States and other western nations occupied Western Germany in an effort to prevent the nation from rising to military power once again, like they did prior to WWII.

The plan was proposed by Joseph Stalin, arguing that if Germany rose to power a second time (like they had with the rise of Hitler between WWI & WWII), it would threaten European and international peacetime once again. The Allies agreed that they each would occupy a specific zone in the nation and administer the country until it could be reunified.

This kept Germany as a whole weak, and dependent on each occupying force for goods, which was part of the plan. By 1948, the Allies had begun unifying their sectors to help rebuild the nation, and the occupation ended around 1952, only to lead to the division of West and East Germany, and the rise of the Cold War.

Explain different ways of determining latitude​

Answers

Answer:

Latitude measures how far a point is north or south of the equator.  the earth is round, distance from the equator is measured in angular degrees with the equator being 0 degrees and the northernmost point ..the North Pole -- being at 90 degrees.

A few ways of determining latitude are,

by comparing a person's position on Earth, by taking into consideration other geographical factors. Observing the position of the Sun.

What is latitude?

A latitude refers to as the unit of measurement, generally used to determine the position of a geographical region compared to the North Pole and the South Pole.

One can determine the latitude of any given region either by comparing their positions with the position of the North Pole. Additionally, the position of the Sun can also be compared with geographical position of any given region to determine the latitude.

Hence, the significance of latitude is aforementioned.

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hii! i’ll give brainliest pls help

Answers

Answer:

A flood

Explanation:

Answer: floods

Explanation: the up hill crops mean that they are trying to keep the lower ground far from  there farm so it cant flood :)

Why does Calgary receive more precipitation in the summer months?

Answers

Answer:

The elevation changes in mountains and foothills are the "ingredients" needed for thunderstorm development which adds to rainfall totals. Finally, as temperatures rise during June, daytime heating creates early afternoon clouds which can lead to late day showers or thunderstorms.

Both Canada and the United States have __________ economies. A. command B. developing C. market D. mixed Please select the best answer from the choices provided A B C D

Answers

mixed ..answer

I think so.....................

Answer:

Yepp the guy up is correct its: D or Mixed

Explanation:

I just did the test

write one use of each magnesium hydroxide and carbonic acid.

what is indicator?

Answers

Explanation:

Indicators are substances that are used to test whether a substance is acidic or basic ot neutral in nature. They change their color when added to a solution containing an acidic or a basic substance. ... Naturally occurring indicators are turmeric, litmus, china rose and red cabbage.

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