New research led by the University of Birmingham has found that most of the methane gas emitted from Amazon wetlands regions is vented into the atmosphere through tree root systems, with significant emissions taking place even when the ground is not flooded. After carbon dioxide, methane is the second most important greenhouse gas, contributing significantly to global warming. According to an increasing number of studies, it appears that much of our atmospheric methane emerges from wetlands. However, most of these studies assume that methane is only...