Answer:
About 5billion years ago is the correct option.
Explanation:
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Mature and established trees die for a combination of reasons but sudden browning of foliage is typically associated with a lack of water supply to the canopy. Water supply can be cut off to the canopy due to obvious issues including deficiency or root damage.
<h3>What is Carbon?</h3>
- Carbon is a chemical component with the symbol C and atomic number It is nonmetallic and tetravalent—its atom makes four electrons unrestricted to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon produces up only about 0.025 percent of Earth's crust.
- Carbon is employed in some way in almost every industry around the globe. It is used for fuel in the form of coal, methane gas, and crude oil (which is used to produce gasoline). It is used to make all sorts of fabrics including plastics and alloys such as steel (a mixture of carbon and iron).
- Carbon is a chemical element with the symbol C and atomic number 6. Categorized as a nonmetal, Carbon is a solid at room temperature.
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Clean coal technologies, such as advanced coal-fired power generation and carbon capture and storage, can allow the world's coal resource to be used in ways that are compatible with environmental and climate goals. The correct option is C.
<h3>What is coal capture and storage?</h3>
Carbon capture and storage (CCS) is the process of capturing carbon dioxide (CO2) before it enters the atmosphere, transporting it, and storing it for centuries or millennia (carbon sequestration).
Clean coal technologies, such as advanced coal-fired power generation and carbon capture and storage, can allow the world's coal resource to be used in ways that are compatible with environmental and climate goals.
Thus, the correct option is C.
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