Changes in vegetation = > changes in albedo / CO2 levels. (realclimate.org)
Project Earthshine data show changes in albedo shown in blue, ISCCP - FD shown in black and CERES in red. (watertechbyrie.com)
However, there are also changes in the albedo of snow due to growth of biological communities based on algae when nutrients are deposited on snow. (realclimate.org)