Xinyi asked John why sulfur dioxide is harmful. What is a harmful effect of sulfur dioxide?

Xinyi saw a poster showing carbon monoxide and asked John, “Where does it come from?” Which is a common source of carbon monoxide in urban areas?

Methane is 25 times more potent than carbon dioxide as a greenhouse gas. Which source is a major contributor to atmospheric methane levels?

John, still full of bad ideas, decided to burn magnesium ribbon in the air sample to 'see what happens'. After burning, what product would remain in the jar?

A student sets up two sealed flasks: one with oxygen and methane, and one with oxygen and nitrogen dioxide. Both are exposed to UV light. Which flask would most likely contribute to the formation of ground-level ozone?

During Science Club, Xinyi tries to calculate how much CO₂ is formed when 4 moles of carbon monoxide are passed through a catalytic converter.