Question

which of the following can be done to prevent global warming? cut down trees. use foam fire extinguishers. use halon fire extinguishers. do not recycle old cfcs.

Explanation:

Cutting down trees reduces carbon - sequestration ability, foam, halon fire extinguishers and not recycling old CFCs contribute to environmental harm and greenhouse gas emissions. None of these actions help prevent global warming.

Answer:

None of the above