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 capacity. Foam, halon fire - extinguishers and non - recycling of CFCs contribute to environmental harm and greenhouse gas emissions. None of the given options help prevent global warming.

Answer:

None of the above options can be done to prevent global warming.