Will vs. Might (certain or uncertain)

Soon, a large number of polar bears will lose their habitat.

Biologists might be able to do some temporary things, such as building ice platforms for polar bears to rest upon.

However, most scientists agree that this will not help polar bears hunt for food or build their dens.

The only way to help polar bears will be to slow down global warming.

That might be possible if we can lower greenhouse gas emissions.

Human activities will need to change.

Natural changes in the climate system will continue with global warming.

As a result, scientists can't say when all the ice will melt.