Question:

Which source provides the best material for your assignment?

A It may be true that some businesses profit from buying up wetlands; however, the important point is that wetlands are disappearing. An ecologist noted that there are not enough private donors to buy these places.

Explaination

It may be true that some businesses profit from buying up wetlands; however, the important point is that wetlands are disappearing. An ecologist noted that there are not enough private donors to buy these places. This choice addresses the issue, uses information from both sources, but puts the emphasis on the qualified viewpoint (which is that of the ecologist; a physics professor may be smart, but ecology is not his field of expertise).