There doesn't seem to be a notable environmental scientist named James Harkin. It's possible there might be a less well-known figure with that name who made contributions in the field, but there is no readily available information about him.

Perhaps you're thinking of a different name, or have misremembered a detail. If you can provide any additional context, such as a specific area of environmental science or the time period they were active in, I might be able to help you find more information.