Julian Agyeman, a professor of Urban and Environmental Policy and Planning at Tufts University, believes that social justice and environmental justice are—or at least, should be—inextricably intertwined. The question we need to be asking, Agyeman says, is how do we improve people’s lives in a just and equitable manner, and how do we do that while living in the limits of supporting ecosystems? Agyeman cites research that demonstrates the link between social justice and environmental protection, adding, “Maybe the way we treat each other can be indicative of the way we treat the environment.” He also speaks about the corrosiveness of income inequality, and the link between income inequality and a nation’s carbon footprint. Agyeman advocates for increased “joined up” thinking in the global North, particularly the US and Europe, that doesn’t separate issues of social justice from issues of environmental justice. He highlights a program called Clean Buses for Boston that sought to tackle both pollution and high rates of asthma in a lower income neighborhood being disproportionately affected by CO2-belching buses.