12. Uncertainty All estimates of emission reductions and removals have some uncertainty associated with them. In some cases, it will be possible to quantify this uncertainty. Estimates of climate benefits with high levels of uncertainty are unlikely to be credible unless projects can demonstrate why the estimates are conservative. Within PDD section G6, Plan Vivo projects are therefore required to: Identify the main sources of uncertainty in estimates of climate benefits Quantify these where possible Describe why the treatment of uncertainty contributes to a conservative estimate of climate benefits.