The city council of Brooksville has proposed a new policy to expand the public park system, arguing that increased green spaces will enhance community well-being and reduce stress among residents. Supporters of the policy cite that cities with more parks often report higher levels of happiness among their inhabitants. On the other hand, some council members argue against the proposal, claiming that the funding for the parks could be better allocated to improving public transportation instead.
Which of the following, if true, would most strengthen the city council's argument for expanding the public park system?