text: The five researchers report that both theory and experiments suggest that over the past several decades "plant photosynthesis should have increased in response to increasing CO 2 concentrations, causing increased plant growth and forest biomass." And in this regard they find that "long-term plot data collectively indicate an increase in carbon storage, as well as significant increases in tree growth, mortality, recruitment, and forest dynamism." They also say that satellite measurements "indicate increases in productivity and forest dynamism," and that five Dynamic Global Vegetation Models, incorporating plant physiology, competition, and dynamics, all predict increasing gross primary productivity, net primary productivity, and carbon storage when forced using late-twentieth century climate and atmospheric CO 2 concentration data." In addition, they state that "the predicted increases in carbon storage via the differing methods are all of similar magnitude (0.2% to 0.5% per year)." What it means