Carl Pope

Former executive director and chairman, Sierra Club

What is mystifying is why almost all of America's political class is willing to support a set of policy decisions whose outcomes will be to impoverish most Americans and weaken the nation.

Tom Engelhardt

Editor, TomDispatch.com

To destroy our planet with malice aforethought, with only the most immediate profits on the brain, with only your own comfort and wellbeing (and those of your shareholders) in mind: Isn't that the ultimate crime?

Ian Roulstone and John Norbury

It has been said by various authors that climate is what we expect, but weather is what we get. How can we use math and supercomputers to predict the change in variability of weather?

Amy Whitley

Staff writer, Go Green Travel Green

Traveling green isn't limited to vacationers booking eco-lodge stays, safaris, and outdoor adventure tours. Anyone going anywhere can travel with less impact on the environment.

Art Markman, Ph.D.

Executive Editor, Cognitive Science; Psychology and Marketing Professor, UT Austin; Director, the Program in the Human Dimensions of Organizations

What kinds of people are prone to reject the scientific evidence for global climate change? This question was explored in the May 2013 issue of Psychological Science. These researchers suggest that people typically engage in motivated reasoning.

Simon Lester

Trade policy analyst, Herbert A. Stiefel Center for Trade Policy Studies at Cato Institute

What is free trade? Is free trade the removal of protectionism? Or does it mean creating a single market where all goods and services sold in one market can also be sold in other markets?

Bill Chameides

Dean, Duke University's Nicholas School of the Environment

One reason you don't want to have politicians mucking around in the nuts and bolts of science is that they often have a shaky grasp of the science at best.

Brenda Peterson

BrendaPetersonBooks.com

Maybe we're asking the wrong question by just focusing on whether these haunting CGI merpeople are real or myth. The real question is: Why are we making our oceans too dangerous to sustain all life?

Elliott Negin

Director of News & Commentary, Union of Concerned Scientists

Given the Heartland Institute's penchant for misrepresenting science, you would think reporters would be curious about who finances its work. You would be wrong.

Jeff Biggers

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

Before environmental lobbyists and legislators push a hydraulic fracking bill through the Illinois legislature, they need to sit down with farmers in Clinton County and learn how well regulations defended their water, farms and cankered lives from the contamination of coal slurry.

John Seager

President, Population Connection

Those likely to face the most devastating effects of climate change are people -- especially women -- in the poorest parts of the world. People already eking out a living will face serious new challenges to their ability to provide for their families. So how can we best help them?

Lance Hosey

Chief Sustainability Officer, RTKL

Over the past decade the LEED rating system has cut annual carbon emissions by 9.4 million tons -- the equivalent of taking 1.5 million cars off the road. Such numbers show real progress. But there's one problem: Many of these buildings aren't doing as well as expected.

Ocean Robbins

Author, Speaker, www.foodrevolution.org

Have you noticed that when it comes to food policy, the U.S. Congress isn't always an unflinching champion of the public interest? Today, you have an opportunity to do something about that.

D.A. Barber

Independent journalist

If you've noticed the rhetoric about the Keystone pipeline heating up lately, it's because the folks at the American Petroleum Institute are getting nervous. Fighting a four-year PR battle against the reality of climate change isn't easy, so API brought in the big guns.

Drew Hendricks

Tech writer

As a result of global warming and high increase in population density, people are urged to ensure that their homes as well as their commercial buildings are eco-friendly. Eco friendly designs are highly emphasized upon due to their numerous benefits both to the environment and humankind.

Jim Utterback

President, Seminole State College

In May of 2010, my house took a direct hit from a huge tornado. Following that, I applied for a FEMA grant in 2011 to build a storm shelter on campus that would be large enough for 6,000 people in Seminole and surrounding areas to take cover.

Simone Bernstein

Sophomore at St. Bonaventure University

If you're looking to help the residents of Oklahoma, here are eight ways to support the community. While youth and teens may not have their own funds to contribute towards the cause, there are many other ways to support this community in need.