Question

Read the following scenario and answer the questions below.
Almost all environmental scientists agree that gases contribute to global climate change. Carbon dioxide, methane, nitrous oxide, ozone, halocarbons (CFCs and HFCs), and water vapour are the main culprits. These "greenhouse gases" have increased dramatically in our atmosphere in the last 300 years, because of rapid industrialization. Human activities significantly increase greenhouse gases in our atmosphere. Chief among these is the burning of fossil fuels for energy. When we burn fossil fuels, we combine the carbon in fossil remnants of an organic matter with oxygen and release the resulting gasses into the atmosphere. With rising standards of living in developing countries, emissions of carbon dioxide and other greenhouse gases are expected to continue to rise. If unchecked, it is predicted that carbon dioxide levels will reach twice preindustrial levels by mid-century and double again by the end of the century. Computer models have shown that this increase alone could raise Earth's temperatures by 1 to 3C by 2100.
The burning of fossil fuels is chemically most similar to which of the following biological processes?
A) phytoremediation
B) autotrophy
C) chemosynthesis
D) cellular respiration
E) photosynthesis

Answer

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