Pre-Agriculture Land Cover (IMAGE) Science China Press Caption The image on the left depicts a reconstruction of pre-agriculture land cover, and the chart on the right shows carbon emissions from forest, grassland, wetland, and shrubland. Credit ©Science China Press 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.