Teen climate activist Greta Thunberg reached New York on Wednesday after crossing the Atlantic on a 60-foot racing yacht, which she took to avoid the emissions associated with flying.

"Land!! The lights of Long Island and New York City ahead," tweeted Thunberg, who launched the now global Fridays for Future school strikes against climate change.

She is due to attend a United Nations summit on climate change next month, and meet with U.N. Secretary-General António Guterres during a youth summit on Sept. 21.

Land!! The lights of Long Island and New York City ahead. pic.twitter.com/OtDyQOWtF5 — Greta Thunberg (@GretaThunberg) August 28, 2019

"It's not very luxurious, it's not very fancy, but I don't need that," Thunberg told reporters before setting sail on the Malizia II.

The 16-year-old from Sweden has gained attention worldwide with her message that humanity must immediately reduce greenhouse gas emissions contributing to global warming to avert ecological and civilizational collapse.

What began as a quiet protest in front of the Swedish Parliament a year ago exploded into a global movement with more than 2 million teens around the world hosting weekly classroom walkouts.

"We know that our future is at risk," Thunberg told reporters in Switzerland this month at a gathering with her peers. "We would love to go back to school and continue with our everyday lives, but as crucial as this situation is, as serious as this situation is, we feel like we must do something about this now."

"We have anchored off Coney island — clearing customs and immigration. We will come ashore at North Cove Marina earliest 14:45 tide allowing," Thunberg wrote on Twitter on Wednesday.

Thunberg made her zero-carbon journey aboard the yacht, equipped with solar panels and hydro generators, amid devastating fires in the Amazon rainforest. "Our war against nature must end," she said on Twitter in response to the blaze.

The U.N. climate summit on Sept. 23 is intended to accelerate the implementation of the 2015 Paris Agreement — which President Donald Trump pulled the U.S. out of in 2017.

In December, countries meeting in Poland agreed on a set of rules to ensure that they meet the target of keeping global warming below 3.6 degrees Fahrenheit. At the talks, many countries called for a more ambitious temperature goal of 2.7 F, which scientists said in a report last year is safer. But those calls faced fierce opposition from countries, including the United States, delaying any change.

Thunberg will also be participating in the COP25 climate conference in Santiago, Chile, in December.