Green lifestyle was quite the buzz among New Yorkers on Friday as they advocated healthy and sustainable ways of living to mark the 41st annual Earth Day.

One of Earth Day's main events in New York City, the Earth Fair, a dual event taking place both inside and outside of the Grand Central Terminal, features technology companies showcasing their environmental designs, local organic food and a panel discussion on healthy eating and nutrition.

Meanwhile, a parade of more than 30 clean energy vehicles including hybrid garbage trucks toured Manhattan with their GPS- tracked progress appearing on the Times Square screens. A digital forest also flashed on the renowned Times Square billboard, raising public awareness of environmental protection.

In Central Park, children can learn how to turn a used can or container into a planter, and other ways to benefit from going green. Volunteers in Queens gathered in Jamaica Bay to clean up recreational areas to celebrate Earth Day.

"It's much more than a celebration. It's an outreach vehicle, said Pamela Lippe, executive director of Earth Day New York. "We try so hard to attract new people to come and learn about the environment and learn about certain organizations they can get involved in, about products they can buy that are better for the environment."

Earth Day was founded by United States Senator Gaylord Nelson as an environmental teach-in first held on April 22, 1970. Earth Day is now coordinated globally by the Earth Day Network and is celebrated in more than 175 countries every year.