The correct answer is: D. Smoke
Smoke is a mixture of solid particles and gases that are released into the air when something is burned. It can be caused by a variety of sources, including wildfires, industrial emissions, and cigarette smoke. Smoke can contain a variety of harmful pollutants, including particulate matter, carbon monoxide, and volatile organic compounds. These pollutants can cause a variety of health problems, including respiratory problems, heart disease, and cancer.
Carbon dioxide is a gas that is released into the atmosphere when fossil fuels are burned. It is also a natural part of the Earth’s atmosphere. However, human activities have increased the levels of carbon dioxide in the atmosphere, which is causing the Earth’s climate to change.
Carbon monoxide is a gas that is produced when fossil fuels are burned incompletely. It is a colorless, odorless gas that can be deadly if inhaled in high concentrations.
Sulphur dioxide is a gas that is released into the atmosphere
when fossil fuels are burned. It is also a natural part of the Earth’s atmosphere. However, human activities have increased the levels of sulphur dioxide in the atmosphere, which can cause acid rain.All of these pollutants can contribute to air pollution, but smoke is the most common cause.