As usual... local resistance to progress because most of the benefits will be taken away from the community, add in the greenies and a mess of politics. It is a wonder anything gets accomplished these days.
I think that almost all human activity will have some environmental impacts... the logical keys would be to accurately weigh all of the factors for costs and risks, educate all of the people involved, obtain fully informed consent and carry out any such projects with Justice as a guiding principle.
dieselgman