A student reads that the majority of greenhouse gas emissions is carbon dioxide. The student suggests four solutions to help

Question

A student reads that the majority of greenhouse gas emissions is carbon dioxide. The student suggests four solutions to help reduce the release of carbon dioxide in the atmosphere and records them in a
chart.
1. Use public transportation or carpool.
2. Use solar water heaters.
3. Reduce the use of chemical fertilizers on lawns.
4. Use bicycles instead of cars over short distances.
Which solutions would reduce carbon dioxide emissions?
1 and 3 only
2 and 4 only
1, 2, and 4
2, 3, and 4

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