Answer:
"<em>Methane is a greenhouse gas, so its release would likely increase global warming."</em>
Explanation:
Methane is a greenhouse gas, so its release would likely increase global warming.
This is the only one that is both "true," and that applies to climate scientists.
Methane is toxic to marine organisms and would damage the ecosystem if released by killing species.
We are asking about <u><em>climate scientists.</em></u>
This would lead to massive pollution of drinking water.
We do not get drinking water from the ocean (except in some desert countries).
We want to extract and use this gas as a fuel source, but it would be lost to the environment through this process.
Again, climate scientists.