What is a carbon footprint?

Which of the following does NOT help reduce your carbon footprint?

Composting is

A substance is biodegradable if

Which material takes the longest to decompose?

Which word is not a synonym for trash

Where does non recycled trash eventually end up?

Primary air pollution is

Which of the following is NOT an example of primary air pollution

Secondary air pollution is

Which of the following is NOT an example of secondary air pollution?

What is the main source of air pollution?

Which air pollutant causes damage to the nervous system?

Bacteria from ______________builds up in water and pollutes it if not treated.d.

Acid rain is made from

Which one is NOT a form of water pollution?

Where is the most polluted river in the world?

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