Bob Keefe, 07/12/12

Senior press secretary, NRDC

The power is back on in Washington, D.C., the fires are almost out in Colorado. So naturally, those who continue to deny the connection between climate change and extreme weather disasters are once again raising their heads.

Benjamin Young, M.D. and David Cohn, M.D., 07/12/12

As advocates, activists, and concerned citizens who have joined the fight to end HIV/AIDS, we must do more. Today, one new person becomes infected with HIV every 9.5 minutes in the U.S.

Zachary Podmore, 07/10/12

Colorado native, kayaker and environmental blogger

On our kayak expedition, we had trouble identifying the source. In theory, it should be easy. To kayak source to sea, you find the river's start and follow it until it ends. On the upper Colorado, however, matters quickly become more complicated.

Jason Salzman, 07/13/12

Bigmedia.org

It's been fun to watch politicos jumping up and down to catch the attention of Hispanic media outlets, when there was a time not long ago when such outlets were ignored.

Phil Linsalata, 07/10/12

Former daily newspaper reporter

State Attorney General John Suthers is a top candidate on Mitt Romney's short-list to become the nation's top law enforcement official if Romney wins in November, but Suthers' record could actually damage Romney's presidential aspirations.

Arianna Huffington, 07/09/12

We cannot overestimate the devastating human consequences of our unemployment crisis. But we also must not miss out on spotlighting what is working. That's the belief behind the new jobs section we're launching today, Opportunity: What Is Working.

Anne Maxfield, 07/12/12

Entrepreneur, Blogger at Accidental Locavore

Since it's getting to be peak Farmers' Market season, I talked to a couple of farmers who have been at the various Greenmarkets in New York City for years. As you can imagine, they've seen it all.

Ann Brenoff, 07/10/12

Senior Writer, The Huffington Post

Tell me more about what it was like back then, my son urged. Well, I never rode in a car seat as a baby, I told him. In fact, my mom held me on her lap, juggling me and a cigarette at the same time.

Dr. Jim Taylor, 07/10/12

Adjunct professor, University of San Francisco

This is a question that all parents ask themselves... constantly. There are no easy answers and, realistically, there is probably not one single answer. The important thing for parents is to at least ask and try to answer the question for their own family.

Stefan Hankin, 07/10/12

President, Lincoln Park Strategies

Americans in today's political landscape are all too often portrayed in opposition. You are either a Democrat or a Republican, part of the masses or a one percenter. But most Colorado voters don't view energy and conservation within an either/or framework.

Craig Newmark, 07/09/12

Founder, craigslist and craigconnects.org

Now we've got the Internet, held together with code, infrastructure where people can build tools which unite regular people for collective influence. The Net tends to level the playing field, and that tendency only increases over time. That is, the Internet is dramatically lowering the cost of influence and power.

Vanessa Berben, 07/08/12

Managing Editor, The Donnybrook Writing Academy

Just in time for AMC's The Walking Dead marathon this weekend, executive producer Glen Mazzara and I sat down to talk horror, writing and their highly anticipated appearance at this year's Comic Con in my motherland, San Diego.

Ernest Drucker, 07/07/12

Epidemiologist, Columbia's Mailman School of Public Health

Just like ending alcohol prohibition, making the current crop of drugs legal simply means changing the laws. But changing the laws has been turned into a bloody legal and political battle that is about everything except drugs.

Gary Hart, 07/06/12

President, Hart International, Ltd.

There is a special place in hell, wrote the immortal Dante, for those who, in times of moral crisis, preserve their neutrality. How much worse place in hell must there be for those who perversely destroy Nature herself in the interest of money?

Donna Solomon, DVM, 07/06/12

Veterinarian, Animal Medical Center of Chicago

Have fun in the sun, but be careful. Don't push your pets too hard in the summer! Here are my top 10 interesting facts or suggestions regarding summer heat and your pets.

Michele Swenson, 07/06/12

Author, activist

Rather than serious consideration of how to provide health care access to all, discussion of U.S. health care reform has frequently been reduced to political calculation, driven by big-money stakeholders.

Ariel Charney and Hannah Young, 07/04/12

On a day set aside to reflect on what our country means to us, we're calling on all Americans to think about what they can freely do to make our cities better. Let's ask not what our cities can do for us, but what we can do for our cities.