There are many ways to measure park access, but we also need to make a better accounting for the role of historical patterns of racial discrimination. This article examines a case study in Texas.
How much is the world’s most productive river worth? Here’s how experts estimate the value of nature: Southeast Asia’s Mekong may be the most important river in the world. Known as the “mother of waters,” it is home to the world’s largest inland fishery, and the huge amounts of sediments it transports feed some of the planet’s most fertile farmlands. Tens of millions of people depend on it for their livelihoods.