In the Netherlands, the case was based on human rights as defined by the European Commission on Human Rights. In this case, the public trust doctrine based on state laws is what is being argued, so it would likely only apply to the state of Oregon. The Supreme Court ruling against regulating emissions would have applied to federal law, not state common law, which is why the states can make a distinct ruling. There are many avenues for lawsuits (of course). In 2015, Washington had a lawsuit where teenagers won a case to force the state to consider science-based emissions regulations. Also going on in Europe is a lawsuit in Belgium.