Question

read the text. then answer the question.
earths atmosphere has always contained greenhouse gases. natural sources of greenhouse gases include respiration, decomposition, and volcanic eruptions.
the concentrations of greenhouse gases in earths atmosphere have changed over time. but in recent years, humans have been adding an especially large amount of greenhouse gases to the atmosphere. one way humans add greenhouse gases to the atmosphere is by burning fossil fuels, such as coal, oil, and natural gas.
which of the following activities could release greenhouse gases into earths atmosphere?
select all that apply.

• a person driving a gasoline - powered car
• a chef cooking over a gas stove
• an animal breathing
• a company operating a coal - fired power plant

Explanation:

• For "a person driving a gasoline - powered car": Gasoline is a fossil fuel. Burning gasoline in the car's engine releases greenhouse gases (like CO₂), so this activity releases greenhouse gases.
• For "a chef cooking over a gas stove": Natural gas is a fossil fuel. Burning natural gas for cooking releases greenhouse gases, so this activity does too.
• For "an animal breathing": Respiration is a natural source of greenhouse gases (animals release CO₂ when they breathe), so this releases greenhouse gases.
• For "a company operating a coal - fired power plant": Coal is a fossil fuel. Burning coal in the power plant releases a large amount of greenhouse gases, so this activity releases them.

Answer:

a person driving a gasoline - powered car, a chef cooking over a gas stove, an animal breathing, a company operating a coal - fired power plant