Terrestrial ecosystems regulate climate by their exchange of greenhouse gases with the atmosphere. The "Greenhouse Gas Value"(GHGV) is a measure for the greenhouse gas benefit of preserving an ecosystem over a multi-year time frame, or the cost in terms of greenhouse gases when the ecosystem is cleared. GHGV is an adequate measure to assess the climate regulation service that ecosystems provide. The contribution of CO2 to GHGV was quantified in a global study using a dynamic vegetation model which outcomes are presented in an online application.It visualizes GHGV and its changes from pre-industrial time to future scenarios and shows the effect of the three environmental drivers climate, atmospheric CO2 concentration, and land use on GHGV.