Free-market environmentalists therefore argue that the best way to protect the environment is to clarify and protect property rights. This allows parties to negotiate improvements in environmental quality. It also allows them to use torts to stop environmental harm. If affected parties can compel polluters to compensate them they will reduce or eliminate the externality. Market proponents advocate changes to the legal system that empower affected parties to obtain such compensation. They further claim that governments have limited affected parties' ability to do so by complicating the tort system to benefit producers over others.