Financial Times: The Amazon forest is alarmingly sensitive to reduced rainfall, a comprehensive analysis of an unusual drought in 2005 has shown. The study provides the first evidence that Amazonia could release vast amounts of carbon dioxide into the atmosphere if climate change produced hotter, drier weather in the region. In normal years the forest absorbs nearly 2bn tonnes of CO 2 , acting as a vast carbon sink that helps reduce the impact of human activities. The drought caused a loss of …