In what is becoming an annual event, increasingly frequent and more intense  fires are sweeping through the tropical rainforests of Indonesia and Brazil. The  burning of the rainforests not only threaten biodiversity in the affected areas  but, by contributing towards climate change, they also put the entire planet at  risk. In tropical latitudes, months pass without any rain and in the dry season  forests become susceptible to fire. These can occur naturally and would normally  not pose a serious problem, but clearing land as a result of logging or to make  way for plantations is exacerbating the problem and every year the fires spread  faster and further.  » original news