The Amazon rainforest is key to the health of the entire planet. It is the largest rainforest in the world, __1__ (rough) half the size of the United States. Statistics show that nearly 20% of the oxygen __2__ (produce) by the Earth's land comes from the Amazon rainforest. It also puts an enormous amount of water into the atmosphere at a time __3__ cities are drying up. The Amazon rainforest is sucking in greenhouse gases while slowing the rising temperatures. __4__ it's now burning at a record rate—with images from space __5__ (show) the smoke covering much of Brazil.

It's not the only major forest in danger. Nearly half of the world's forests that __6__ (stand) when humans started farming are now gone. The chief reason is the expansion __7__ agriculture into forested areas. In Brazil it's cattle ranching, soy production and logging, according to Nigel Sizer, tropical forest ecologist. “It is responsible for 80% to 90% of __8__ loss of tropical forests around the world.”Environmental groups say these activities can __9__ (reduce) in a much more sustainable way.

However, you can help reforest parts of the world through the Rainforest Trust and the Rainforest Alliance. The Rainforest Trust allows you to restrict your donations to a specific project. The Rainforest Alliance says 100% of your __10__ (contribute) will help stop deforestation in Brazil right now.