Heather Libby, 07/30/12

Managing editor, TckTckTck.org

Pipeline companies like Transcanada, Enbridge, Shell and Kinder Morgan remind me of guys who just won't take no for an answer. They're going to keep coming back no matter what we tell them, unless we cut them off for good.

Chris Fici, 07/30/12

Hindu Writer, Minister, Teacher

If you have a "green thumb", if your fingernails are constantly caked in dirt (like Terry's), or if you simply desire to make our ecological footprint more sane, then Terry is a fountain of knowledge to take advantage of.

Douglas LaBier, 07/30/12

Business psychologist and psychotherapist; Director, Center for Progressive Development

With a green leadership mindset, leaders become equipped to create and act upon sustainable practices. And those are likely to generate larger-scale actions: support for public policies that will ensure long-term success, wellbeing, and security for all segments of society.

Michele Simon, 07/30/12

Public Health Lawyer

The food industry is always in charge. That's why the nation's largest packaged food lobby and its members are shaking in its boots over 90 percent of Californians wanting to see GMO labeling on food.

Brian Moody, 07/30/12

Site Editor, AutoTrader.com

Just because you want to use fewer resources and pollute less, you don't need a hybrid. In fact, there are plenty of great alternatives out there that sip fuel, cost less and provide a better driving experience than a hybrid.

Carol Hsin, 07/30/12

Student, Yale University

Hartington became a stop on my cycling journey because opponents of the proposed extension, Keystone XL, have cited the leaks there as reasons to be wary of XL.

Maggie Sergio, 07/30/12

Writer, Conservationist and Concerned Citizen of the Planet

Peet's Coffee & Tea has announced to the world that it intends to be acquired by Joh A. Benckiser, a major stakeholder in Reckitt-Benckiser. Reckitt-Benckiser is the company that manufactures and markets the most widely distributed rat poison on the market, d-CON.

David Kirby, 07/30/12

Author/Journalist

For the first time in nearly two-and-a-half years since the 12,000-pound orca Tilikum brutally killed his trainer Dawn Brancheau at SeaWorld Orlando, the company is now allowing certain trainers to reenter the water.

Mary Ellen Harte, 07/30/12

Biologist and author

Making the U.S. a global clean energy leader will ensure a heck of a lot more jobs, and a clean, safe future.

Mia Steinle, 07/30/12

Investigator, Project On Government Oversight

An ongoing government analysis of an important nuclear weapons laboratory's ability to withstand earthquakes may be flawed, according to a federal oversight panel.

Lucy Cooke, 07/30/12

National Geographic explorer, writer, producer & TV presenter

When under attack, this walking pine cone curls himself into a tight ball, protecting his soft underbelly with his scaly, razor-sharp armor.

Eli Lehrer, 07/30/12

President, R Street

Not every environmental problem can be solved with less spending and reduced regulation. Fundamental laws protecting the environment must remain. But, all-in-all, a small government, conservative policy can do a lot of good for the environment.

Joaquin Sosa, 07/30/12

Sierra Club 2012 Outdoor Youth Ambassador

I landed in San Juan with no contacts, no addresses and only a vague idea of what I would be doing on this beautiful island.

Wenonah Hauter and Shane Robinson, 07/29/12

From start to finish, fracking is too risky for Maryland -- it threatens the air we breathe, the water we drink, the communities we love and the climate we depend on. Marylanders should urge their representatives to support a ban on fracking.

Adrian Grenier and Peter Glatzer, 07/27/12

If necessity is the mother of invention, then it's no wonder the state of the environment is driving innovation around the world.

Jeff Biggers, 07/28/12

Author of forthcoming book, 'State Out of the Union: Arizona and the Final Showdown Over the American Dream'

Ramping up renewed efforts to end mountaintop removal mining in central Appalachia, scores of protesters staged a daring action at the controversial Hobet strip mine today in Boone County, West Virginia.

Brendan DeMelle, 07/27/12

Executive Director, DeSmogBlog.com

Tim Ball and John O'Sullivan had a close working relationship, even before Mann sued Ball for libel in March 2011. For example, they co-authored the climate science denial book Slaying the Sky Dragon: Death of the Greenhouse Gas Theory.