Answer:
The Great Oxidation Event (GOE), sometimes also called the Great Oxygenation Event, Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, or Oxygen Revolution, was a time period when the Earth's atmosphere and the shallow ocean experienced a rise in oxygen, approximately 2.4 billion years ago (2.4 Ga) to 2.1–2.0 Ga during the Paleoproterozoic era.
Explanation:
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The answer is true it can be traced to one particular reason.
Answer: D
Explanation:
By 2100 Global warming would have more than double as the release of chlorofluorocarbons into the atmosphere does not seem to abase. The industrial zone of Pittsburgh, US contributes a lot to the increase in the atmospheric temperatures of the surrounding areas. The continually high demand for wood charcoal by pharmaceutical companies, households, and food vendors in developing countries would mean more deforestation which consequently expose the earth's crust to high insolatoon from the solar system.
However, the replacement of natural landscape by human landscape is on the rise. In the UAE, Dubai alone has u number of construction projects, from skyscrappers to artificial islands. More trees would be removed to make these construction projects possible. The consequent effect of all these cannot be anything other than more warming of the globe.
Explanation:
<h3>These include the chemical, cellular tissue, organ, organ system and the organism level. </h3>
