The scientists wanted to know if the information gathered by satellites was as good as the information they would get if they gathered it in person. The scientists in this study wanted to discover whether information gathered by satellites could be used to identify the age of tropical rain forests and to estimate the increase in the amount of biomass in growing rain forests. They also wanted to know if information gathered by satellites could be used to estimate the amount of biomass held by old Topics: Active Forest Management, Wilderness, Biomass, Carbon Dioxide, Fossil Fuels, Landsat, Satellites.