Global warming is caused by greenhouse gases which are often produced through which of the following activities:

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The question asks which activities commonly contribute to greenhouse gas emissions that drive global warming, so we should evaluate each option in turn.
Option 1: 'All of these answers' — This is the umbrella option that would be correct if every listed activity contributes to greenhouse gas emissions. Since each of the other options describes a sector with known emissions, this option would be true in the real-world context.
Option 2: 'Transportation – using gasoline to power cars' — Transportation relies heavily on burning fossil fuels, which releases carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). Cars, trucks, airplanes, ships, and trains powered by internal combustion engines are major sources of CO2 emissions globally, so this option is correct about transportation.
Option 3: 'Industry – Creating petroleum plastics' — Industry uses fossil fuels and processes that release CO2 and other greenhouse gases during energy use and chemical processing. The production of plastics derived from petroleum involves energy consumption and emissions, making this option correct regarding industrial impact on greenhouse gases.
Option 4: 'Agriculture – especially red meat production' — Agricultural practices, particularly enteric fermentation in ruminant animals like cows and sheep, release methane, a potent greenhouse gas. Red meat production is associated with higher methane and other emissions, so this option is correct about agriculture.
Option 5: 'Energy – using coal or oil to power our cities' — Burning coal and oil for electricity and heat is a major source of CO2, along with other pollutants. This option correctly identifies energy sector emissions as a contributor to greenhouse gases.
Overall, each individual option reflects a known pathway for greenhouse gas emissions, and together they encompass the major human-related sources of these gases.

25F-PUB HLT-C150-LEC-1 Second Midterm Exam: Wednesday, December 3

Global warming is caused by greenhouse gases which are often produced through which of the following activities:

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