There are more habitable planets in our galaxy than Humans living on planet.

But the nearest one is about 70 trillion miles away, which means that, for now, and for the foreseeable future, Earth is the only life-supporting space we will ever know.

It is really not the best idea to let it burn up. Key to keeping it cool are the massive rainforests of the Amazon.

A new project should help prevent that hot future. If all goes to plan over the next six years, a project led by Conservation International will become the largest tropical reforestation project in history.

Seventy-three million trees will planted across what is known as the arc of deforestation, in the Brazilian states of Amazonas, Acre, Pará, Rondônia, and throughout the Xingu.

The short-term plan is to restore 70,000 acres (30,000 soccer fields) that have been cleared for pastureland.

Despite the reality that millions of acres of rainforest are still disappearing, there are now more trees and other vegetation on the planet than there were in 2003.

This project will help Brazil move toward its Paris Agreement target of reforesting 12 million hectares of land by 2030, and may prove key in restoring much of what has been lost in our lifetime.