Giving suggestions and ideas for solutions can be made in various manners. Remember that the purpose is to propose solutions; not to give commands, to tell what "must" be done or to state facts.

Researchers suggest that we should cut our fossil fuel consumption in half by the year 2000.

Nuclear experts believe that new generations of safe reactors could help solve the problem of the global warming and should be developed.

I think that people ought to stop cutting down tropical forests.

Maybe more research should be done to promote alternative sources of energy.

Environmentalists say that the amount of carbon dioxide put into the atmosphere needs to be reduced.

In my opinion, and in the opinion of several researchers, the consequences of global warming should be better studied.

**Notice that the helping verbs should, ought to

or need to are used in making suggestions.**

One idea is to search for ways to decrease the amount of greenhouse gases in the atmosphere.

Another idea is to plant more trees in cities and other places where there are few remaining.

It would be good if people stopped using products that emit chlorofluorocarbons.