Andrew Gorden

New research conducted by the CDC in Atlanta is aimed at understanding just how prevalent exposure to dangerous levels of highway noise is. Such exposure can play a detrimental role in one's health.

Scientists have created <em>sounds</em> from air pollution data that allow listeners to hear the striking differences and similarities between the air we breathe in America's most polluted city and remote pine forests.

America's burgeoning bicycle culture gets the star treatment, as <em>USA Today</em> focuses its attention on the new infrastructure, new funding, and new culture that have made bicycling in Portland an ease.

"It's like the gardener's version of graffiti," says one. In San Francisco, activists hope to transform once-purely ornamental street trees into fruit-bearing ones, to provide fresh fruit to the local community.

As Generation Y-ers (or Millennials) reach maturity, some question the generation's ongoing adoration of the city, and whether it will continue as they begin to marry and raise children.