The story about wolves, elk, and the Yellowstone ecosystem has been told and retold by U.S. news media. The gist is that the reintroduction of wolves restored balance in overgrown elk populations -- which in turn allowed restoration of aspen groves which the elk had been overbrowsing. But new evidence suggests the story isn't really true -- or that a true understanding of the ecosystem is far more complex. That in turn raises issues about how U.S. news media cover the environment.

"Researchers have found that children living in central and northern Wisconsin communities that don't disinfect their drinking water systems have a greater likelihood of contracting gastrointestinal illnesses than children who rely on other water systems."

"Latinos and African Americans make up a disproportionately high percentage of the population of California ZIP Codes most burdened by pollution, according to a report released Friday by state environmental officials."

"WASHINGTON -- A report due to be released Tuesday aims to offer an object lesson to President Barack Obama: Free trade deals have high costs in unintended consequences for the environment, people's way of life, and local sovereignty."