Greener trees may be sign a volcano will erupt
For centuries, volcanologists have been predicting when volcanoes will erupt. Forecasting when a volcano might blow has been pretty unreliable. However, a study from NASA scientists and the Smithsonian Institution say they are a step closer to providing more accurate forecasts. They used images from space to detect changes in the colour of leaves near volcanoes. The study showed that an increase in carbon dioxide levels emitted by two active volcanoes in Costa Rica had an impact on the colour of foliage. Trees in the surrounding areas became greener. |