Environmental litigation often brings in the popular imagination a battle between some big polluting corporations and marginalised people abandoned by the state (the movie Erin Brockovich comes to mind). Those cases do exist, but the majority of environmental law is operationalized by government agencies balancing competing interests, usually economic development with environmental protection. This often results in a compromise: allowing a polluting activity, but with some mitigation measure to limit the environmental effects. But what happens when the two competing interests in front of the executive are environmental protection? This is what the Environmental Review Tribunal of Ontario (ERT) had to deal with in the case Alliance to Protect Prince Edward County v Director, Ministry of the Environment, ultimately largely upheld by the Court of Appeal. This case presents the interesting issue of balancing the need for renewable energy and the impacts such a project can have on the environment, such as the endangered Blanding’s turtle.