Scientists Are Building a Fake Amazon Rainforest to Save the Real One

Scientists in the Amazon rainforest are running a huge climate experiment. They are pumping extra carbon dioxide (CO2) into a small section of the forest. CO2 is the gas released by cars and factories that traps heat in the atmosphere. The goal is simple: see how the forest reacts to the higher CO2 levels expected in the future. Will the trees grow faster? Will they survive? This experiment is important because the Amazon is often called the "lungs of the Earth." It produces a large amount of the oxygen we breathe and absorbs massive amounts of CO2. If the forest dies, climate change will get much worse. If it thrives, it may help slow global warming. Researchers say this is one of the only ways to understand what happens next. The results could shape global climate policy for decades.