Yvo de Boer, the UN's climate chief has announced his resignation -- what this means for the worldwide effort to rein in global warming.
Ecotherapy, a new branch of psychotherapy, explores nature-based ways to cope with depression and anxiety.
President Obama's proposed budget for NASA puts the US space agency on a new, commercial trajectory.
New study indicates chemicals found in flame retardants may effect the intelligence of young children.
West meets East in a new book that rewrites Thoreau’s classic work in haiku form, reviving the glorious imagery of "Walden."
A group of scientists are calling for a moratorium on mountain top removal mining, saying the environmental impacts are irreversible.
Exploring some of the changes to the human landscape in the next decade, and what some experts are planning to do about them.
Nations big and small pledged money and action to combat climate change, but many question whether promises will be kept.
By every index, the Danes are some of the happiest people in the world -- sociologist Peter Glindelock explains why.
One of the first green jobs programs in the US was started in the South Bronx, by a filmmaker turned community activist.