It's no fun to protest on an empty stomach.

Fighting climate change isn't just an obligation we owe to future generations. It's also an opportunity to improve public health - and drive economic growth - in the here and now.

Despite its potential, the federal government has restricted funding for creating new cell lines - putting the burden of any future research squarely on the shoulders of the private sector. Government's most basic responsibility, however, is the health and welfare of its people, so it has a duty to encourage appropriate scientific investigations that could possibly save the lives of millions.

On Sept. 11, 2001, thousands of first responders heroically rushed to the scene and saved tens of thousands of lives. More than 400 of those first responders did not make it out alive. In rushing into those burning buildings, not one of them asked, 'What God do you pray to?' What beliefs do you hold?'

There will be ups, there will be downs, there will be sideways. I can just tell you I have been hired, I have been fired, I have been lauded, I have been vilified. I've said some of the most brilliant things that just by accident appeared on my tongue, and I've said some of the dumbest things that you could imagine. But each day - even the day that I knew I was going to be fired - I looked forward to because I've always believed that tomorrow was going to be the best day of my life.

We may not always agree with every one of our neighbors. That's life. And it's part of living in such a diverse and dense city. But we also recognize that part of being a New Yorker is living with your neighbors in mutual respect and tolerance. It was exactly that spirit of openness and acceptance that was attacked on 9/11, 2001.

What you've got to do is be honest. Say what you believe. Give it to them straight. Just don't wuss out.