Oil is one of Saudi Arabia's major exports.
Answer:
This is the best explanation for why there is such a small amount of phosphorus that moves into aquatic systems:
1. Phosphorus is highly stable in the atmosphere and remains there for long periods of time.
Explanation:
The phosphorus first cycle is the process by which the phosphate ion passes in very small amounts through the lithosphere from volcanic aeorosols, then to the hydrosphere, where it stays from 20,000 to 100,000 years in the ocean, and finally to biospherere, where rain and erosion helps washing the phosphorus from the rocks into the soil. So, raining is the beginning of the phosphorus´s second cycle, so it is also, the slowest one of the matter cycles that is why the natural total background phosphate levels in several bodies of freshwater range from 0.005 to 0.05 mg/L. Phosphorus remains mostly on land and in rock and soil minerals.
Although abundant on our planet´s sedimentary rock crust and in human body, phosphorus to commercialize is only found in minerals therefore, phosphates mining activity and calcium heating is the only way to get it in its pure elemental form. It is an essential nutrient for plants and animals and a big percentage of the mined phosphorus is used to make fertilizers.
Answer:
The abyssal plains of the eastern Atlantic Ocean stretch from the continental shelf to the base of the mid-ocean ridge.
Explanation:
The others are false
I agree with mixed economy because mixed economy will always protect the private property and it will give room for capital freedom in the economy.
<h3>What is economic system?</h3>
Economic system is a type of system of production in which resources produced in a location are allocated and also distribution of goods and services are carried out within a geographic area.
Therefore, I agree with mixed economy because mixed economy will always protect the private property and it will give room for capital freedom in the economy.
Learn more about economic system below.
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Answer:
The Mackenzie River flows into Beaufort Sea and Arctic Ocean.
