17. Which of the following is a greenhouse gas? a. oxygen b. carbon dioxide c. sulfur dioxide d. nitrogen e. argon

The correct answer is b. carbon dioxide.Greenhouse gases are gases in the Earth's atmosphere that trap heat and contribute to the greenhouse effect. Carbon dioxide (CO2) is one of the primary greenhouse gases, along with methane (CH4), nitrous oxide (N2O), and fluorinated gases.Carbon dioxide is released into the atmosphere through various human activities, such as the burning of fossil fuels (coal, oil, and natural gas), deforestation, and certain industrial processes. It is a significant contributor to climate change and global warming.The other options provided are not considered greenhouse gases:a. Oxygen (O2) is a vital gas for life on Earth, but it does not have significant greenhouse properties.c. Sulfur dioxide (SO2) is a gas that can contribute to air pollution and acid rain, but it is not a primary greenhouse gas.d. Nitrogen (N2) makes up the majority of the Earth's atmosphere, but it is not a greenhouse gas.e. Argon (Ar) is a noble gas that is chemically inert and does not have significant greenhouse properties.Therefore, the correct answer is b. carbon dioxide.