Select all the correct answers.
Which two suggestions describe how humans could reduce their greenhouse gas emissions?
1. Use natural light instead of electric lights during the day.
2. Dispose of paper and plastic in landfills instead of recycling.
3. Grow your own vegetables in a garden instead of shopping for them.
4.Drive gas-powered vehicles instead of taking public transportation.
5. Use synthetic pesticides and fertilizers instead of organic, natural ones.