It is timed to coincide with a meeting of world leaders at the United Nations, and this Sunday the People's Climate March is intended to send a message on climate change. Peter Iwanowicz, executive director with Environmental Advocates of New York, says the march will be the largest climate action in history. A major goal, according to Iwanowicz, is to get those meeting at the United Nations to talk about climate change and to finally start taking action on the issue. "World leaders have been wringing their hands and trying to figure out what to do about this climate crisis," Iwanowicz says. "It's time for the people to show up and be a part of this so that's why we have the People's Climate March this Sunday in New York City." Iwanowicz says people are even coming by the trainload from the West Coast, and he will be there and bringing his entire family. About 1,400 business, union-and-faith groups are joining the effort. The People's Climate March gets started at 11:30 a.m. at Columbus Circle. While people will be marching from all around the world, Iwanowicz expects a good many New Yorkers to join the march. "New Yorkers really will be speaking loudly that New York State needs a climate action plan," says Iwanowicz. "Governor Cuomo needs to devise a strategy for how we're going to address climate change here in New York; how we're going to reduce pollution, how we're going to make communities more resilient to climate change. We don't have a plan in place right now, and we desperately need one. " Iwanowitz says marchers also are supporting President Obama's proposal to have the Environmental Protection Agency limit climate-altering coal plant pollution, which has come under heavy attack in Congress and by the industry. There is more on ways to join the effort at peoplesclimate.org