Why are grasslands and wetlands vanishing so fast?

Question

Hans Steiner · Accepted Answer

Global study points to agriculture as the main driver

A 15-year global analysis finds that grasslands and wetlands are being converted at a far faster rate than forests — nearly four times faster, according to the study. The primary driver is agricultural expansion: cropland and pasture are replacing these ecosystems to meet growing demand for meat and commodity crops.

The loss matters for climate and biodiversity. Grasslands and wetlands together store a disproportionately large share of the planet’s carbon and biodiversity:

They can hold up to about 35% of the world’s terrestrial carbon, often sequestered in soils and peat.
They overlap with roughly one‑third of global biodiversity hotspots, making them key habitats for many species.

Conversion typically involves drainage, ploughing, or burning, which liberate soil carbon into the atmosphere and fragment habitats. Wetland drainage, in particular, can release ancient carbon stored over centuries and undermine natural flood buffering. For communities that depend on pasture, floodplain fisheries or seasonal grazing, these changes also threaten livelihoods.

The study underscores important policy and management implications:

Protecting and restoring grasslands and wetlands needs to be elevated alongside forest conservation in global targets.
Agricultural policy must reconcile food and livestock production with ecosystem values by encouraging sustainable intensification, better land-use planning, and incentives to keep high‑carbon ecosystems intact.
Monitoring and reporting systems must cover these non-forest ecosystems so loss rates are visible and accounted for in national climate plans.

In short, halting rapid losses of grasslands and wetlands is critical for meeting climate and biodiversity goals, and it will require shifting agricultural incentives and strengthening protections for these often‑overlooked ecosystems.