Large Buttress Tree in Trinidad Forest (IMAGE) University of Edinburgh Caption Forests in tropical regions, such as this forest in Trinidad, could soon become a source of greenhouse gases, contributing to global warming rather than helping to counteract it, according to research led by the University of Edinburgh. Credit Ed Mitchard Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.