I'd have to fall back on the way we define it. We keep it open with respect to harm to a public resource. That is probably the most relevant here. We're not talking about people who suffer economic damage. Let's leave that aside. A claim of harm to a public resource is the closest equivalent we have. It is open to all parties, but the remedies are listed in quite a lot of detail and are quite restrictive. You cannot benefit, personally and financially, from such a lawsuit. You can ask the courts for remedies centred on the environment.
So we deal with that very strictly. People have to come with their own means, in our case, because there is no advance cost on such things. They can bring an action asking the courts to stop this or do something.