Fresh air, lush foliage, rustling leaves and calls of thousands of species of animals and birds—welcome to the Amazon rainforest. Today, on World Rainforest Day, let"s give a shout-out to this region. Covering over 5,500,000 square kilometres, this ecological treasure in South America extends its branches across nine nations—Brazil, Peru, Colombia, Bolivia, Ecuador, French Guiana, Guyana, Suriname and Venezuela.