Afforestation, reforestation and revegetation projects are usually grouped as ARR. They generate credits by increasing carbon stored in trees and other vegetation. Unlike REDD+, which is mainly about avoided forest loss, ARR is usually about building new carbon stocks over time.
That time factor is the first commercial reality check. A planting project may look attractive in a spreadsheet, but credits only arrive as biomass accumulates and monitoring confirms the stock change. Early years can be cash-hungry and credit-light.
What counts as ARR?
ARR can include tree planting on non-forest land, restoration of degraded forest cover, enrichment planting, agroforestry or other revegetation activities, depending on the methodology and project circumstances. The detail matters because land history, existing woody biomass and future management all change eligibility and quantification.
Methodology fit
For voluntary market developers, Verra's VM0047 ARR methodology is one of the major current routes. It uses approaches such as remote sensing and plot-based sampling for some project types, and it has specific rules around additionality, baseline setting and land-cover change. Older CDM-derived routes may still appear in legacy discussions, but new developers should check current registry rules before assuming they remain open for a new project.
Permanence and buffer risk
ARR credits carry reversal risk because the carbon is stored in a living landscape. Fire, pests, drought, illegal harvesting and political instability can all threaten the carbon stock. Standards handle this through non-permanence risk assessment and buffer deductions, but developers should treat that as a project design issue rather than an afterthought.
- Choose species and management plans that are credible for the site, not just high growth on paper.
- Model delayed issuance rather than assuming full credit delivery from year one.
- Budget for monitoring plots, remote sensing, community engagement and remeasurement cycles.
- Be careful with long-term land agreements: ARR projects often need multi-decade control.
Field evidence matters
Good ARR monitoring depends on repeatable field methods. GPS points, plot markers, photo records, sampling logs and survival-rate checks are not glamorous, but they are the evidence chain that keeps a project out of trouble later. For equipment planning, the forestry field kit guide is a practical companion to this article.
For live projects, pair the forestry estimate with feasibility, verification cost and pricing tools so the commercial case is not built on gross volume alone.
Open the full forestry workflow →