Question

1 multiple choice 2 points which of the following is an example of a secondary pollutant? ground - level ozone oxygen nitrogen carbon dioxide 2 multiple choice 2 points what is the main source of carbon dioxide emissions that contribute to global warming? ocean currents plant respiration volcanic eruptions burning fossil fuels 3 multiple choice 2 points what are secondary pollutants? pollutants formed in the air from chemical reactions pollutants that only affect water natural substances found in the environment pollutants released directly from factories

Explanation:

• Question 1: Secondary pollutants are formed through chemical reactions in the atmosphere. Ground - level ozone is formed when primary pollutants (like volatile organic compounds and nitrogen oxides) react in the presence of sunlight. Oxygen, nitrogen, and carbon dioxide (in normal concentrations) are not secondary pollutants. Oxygen and nitrogen are major components of the air, and carbon dioxide is a primary pollutant (released directly from sources like burning fossil fuels).
• Question 2: Burning fossil fuels (such as coal, oil, and gas) for energy production, transportation, and industrial processes is the main source of carbon dioxide emissions that contribute to global warming. Ocean currents do not emit carbon dioxide in a way that contributes to global warming in this context. Plant respiration is a natural process that has been in balance in the carbon cycle for a long time (before significant fossil fuel burning). Volcanic eruptions release carbon dioxide, but the amount is much less compared to fossil fuel burning.
• Question 3: By definition, secondary pollutants are pollutants formed in the air from chemical reactions. Pollutants that only affect water are not the general definition of secondary pollutants. Natural substances found in the environment are not pollutants (unless in excessive or harmful concentrations, but that's not the definition of secondary). Pollutants released directly from factories are primary pollutants.

Answer:

1. Ground - level ozone
2. Burning fossil fuels
3. Pollutants formed in the air from chemical reactions