Part of the Amazon rainforest burns in Porto Velho, Brazil, on Friday, August 23.
Ueslei Marcelino/Reuters

In photos: Fires raging in the Amazon rainforest

Updated 1822 GMT (0222 HKT) August 27, 2019

Part of the Amazon rainforest burns in Porto Velho, Brazil, on Friday, August 23.
Ueslei Marcelino/Reuters

Every year, farmers in the Amazon rainforest wait until this, the dry season, to clear out areas so their cattle can graze.

But this year's fires are way up over last year, and that has raised concern about what it means for the health of the planet.

The Amazon, the world's largest rainforest, is often referred to as "the planet's lungs" because estimates show that nearly 20% of the oxygen produced by the Earth's