I'd be derelict in my duty if I didn't go and continue to use every advantage that I can to promote New York's cause.

Keep in mind, Mike Bloomberg's kids and grandkids are breathing that air just like the coalminers' families are breathing that air. And the coalminers are the ones that have the conflict. They want their jobs, I understand that. They need to be able to feed their families. They also have to worry about their health and the health of their families.

I've always respected those who tried to change the world for the better, rather than just complain about it.

Buy what's deliverable, not what could be.

For sure I would prefer Trump had not withdrawn from the Paris Agreement. But the fight against climate change is really done at the local level - whether it's cities, local governments or the private sector, corporate and individual. No matter what Trump says, nobody is going to go back and take the scrubber out or change back to polluting. The damage that Trump can do is if there are countries that are on the fence about whether they want to address the issue, this gives the naysayers, the doubters, those that don't want to do anything, a little more ammunition.

You must first be willing to fail — and you must have the courage to go for it anyway.

Five years have come, and five years have gone, and still we stand together as one. We come back to this place to remember the heartbreaking anniversary - and each person who died here - those known and unknown to us, whose absence is always with us.