countries size
it makes a country a better place as we know about our situation of natural resources pollution etc...
Answer:
The North American Frift is a powerful warm western boundary current within the Atlantic Ocean that extends the Gulf Stream northeastward.
Explanation:
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Answer:
Biotite
pyroxene
amphiboles
Explanation:
From the given option of the question , the minerals with dark color are as follows -
amphiboles
pyroxene
Biotite
<u>Biotite </u>- This is a mineral of mica , and is deep block or may be brownish in color , the hardness value is 2.5 to 3 .
<u>pyroxene</u> - It is the nineral found in metamorphic and igneous rocks .
<u>Amphiboles </u>- is green to black in color .
The warming of the Earth due to buildup of carbon dioxide and other gases that help trap energy is termed the greenhouse effect.
Because the exchange of incoming and outgoing radiation that warms the earth because heat trapped is close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.
Green house gases:
1) Carbon dioxide (CO2)
2) Methane (CH4)
3) Nitrous oxide (N2O)
4) Industrial gases:
a) Hydrofluorocarbons (HFCs)
b) Perfluorocarbons (PFCs)
c) Sulfur hexafluoride (SF6)
d) Nitrogen trifluoride (NF3)
The concentration of greenhouse gases is increasing in large part because of the combustion of fossil fuels. Key sources of chlorofluorocarbons are solvents, refrigerants, and propellants.
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