According to the BBC, there are currently more than 2,500 fires burning in the Brazilian rainforest. The fires are burning in several Brazilian states, including Para, Mato Grosso, Rondonia and Amazonas. Most of the fires are thought to have been started by humans attempting to clear land for farming and ranching during the dry season. Brazilian right-wing nationalist president Jair Bolsonaro made claims that the fires were started by non-governmental organizations because of reduced funding. He later stated he made no such claims. The fires could be adding to a vicious cycle of climate change in which the blazes add to greenhouse gasses. This leads to rising temperatures, which leads to longer dry seasons, which leads to more devastating fires. Referred to as the "lungs of the earth," the rainforests of Brazil generate more than 20% of all the oxygen in the world. Smoke from the fires has traveled about 1,700 miles and can be seen in Argentina. The fires are also visible from space. U.S. President Donald Trump has joined other nations of the world in offering assistance to Brazil in putting out the fires. #ActForTheAmazon has been trending on Twitter. Protests against what has been viewed as inaction by President Bolsonaro have sprung up all over the world.