added by lilyZ
Earth is the only planet known to maintain life. Find out the origins of our início planet and some of the key ingredients that help make this blue speck in o espaço a unique global ecosystem.
In Porto Velho, capital of a Brazilian state ravaged por recent fires, residents are on edge and falling ill from the pervasive smoke. A hymn describes the city's sky as forever blue, but now it's grey with smoke.