Earth Day New York takes over much of Union Square Sunday.
The annual environmental showcase features a variety of free events, live performances, and a green vehicle exhibition.
From 11 to 6, representatives from car makers will be on hand to talk about the latest green technology and answer questions.
John Oppermann, deputy director of Earth Day New York, says Earth Day 2013, which will be officially observed Monday, focuses on the local impacts of global climate change.
Oppermann says that's especially relevant this year, months after Sandy's devastation affected so many communities.
He says the massive storm turned some residents into environmental activists.
"A lot of people in communities in Staten Island and the Rockaways and places that were particularly affected actually turned that into advocacy and they're channeling their energy into climate change adaptation and mitigation and actually tackling these problems in their own communities."
On Monday Grand Central Terminal's Vanderbilt Hall hosts a discussion with a panel of experts along with a screening of the film, "Do The Math," which follows the work of climate crusader Bill McKibben, the founder of 350.org.