Identify areas requiring investigation, research and restoration in the field of environment.

Perhaps; the subject requires investigation; I am not a physiologist.

This is an area that will require further and significant investigation.

This report indicates there's something that requires immediate investigation, nothing more.

We believe that these issues require further investigation and analysis.

If it's not there, we may have a problem that requires further investigation.

Whether the school somehow failed its students requires further investigation.

The laboratory has simply identified some changes in the cells that require further investigation.

No one thought it was unusual or required further investigation.

This requires investigation to discover exactly what they are up to.