Everything in Earth's<span> system can be placed into one of </span>four major<span> subsystems: land, water, living things, or air. These </span>four<span> subsystems are called "</span>spheres<span>." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).</span>
Answer:
Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination.
Answer: See explanation.
Explanation:
Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.
The answer to the question above is "B. less available tax revenue" based on the GDP calculation formula. The GDP calculation formula is stated as GDP = C + I + G + (Ex - Im) where C is consumers spending, i is investments, G is government spending, and (Ex - Im) is the difference between export and import. A low GDP means a low spending has occurred in the country which results in a decrease in tax revenue.
