Mexico devises revolutionary method to reverse semiarid land degradation

Published August 12, 2021

by Sue Branford

Land degradation is recognized as one of the world’s most pressing environmental problems, with about a quarter of the world’s total land area already degraded, according to the Global Environment Facility (GEF). This adverse land use change has seriously harmed the livelihoods of more than 3 billion people, almost 40% of the world’s population, while exacerbating climate change due to the release of long-sequestered soil carbon and nitrous oxide — a powerful greenhouse gas — into the atmosphere.

Worse may lie ahead. Scientists warn that 24 billion tons of fertile soil are being lost each year, largely due to unsustainable agriculture practices. If this trend continues, they say, 95% of Earth’s land area could be degraded by 2050 — a dangerously unsustainable situation.

However, practical solutions exist, according to Gary Nabhan, a professor at the University of Arizona and one of the world’s leading experts on farming on arid land. “Over the last 50 years, most top-down rural development projects, have failed terribly,” he explains. “But there are guys trying out new ideas at the margins of conventional agriculture, which is where all lasting innovations in agriculture come from. We have to listen to them.”

Troubled times are the mother of invention
One such solution is emerging in Guanajuato state in central Mexico. New ideas are certainly needed in this Latin American nation as it faces climate change-induced severe drought, which is currently affecting 85% of the country. In recent weeks, the rains brought some relief to Guanajuato, though many other parts of the country remain parched.

But even when precipitation eventually does spread to the rest of Mexico, prospects for small-scale farmers are not good. According to Rafael Sánchez, a water expert at the Autonomous University of Chapingo, aquifers are completely depleted. “I have no doubt that in 2022 there will be a crisis, a great crisis,” he warned, anticipating social unrest.

Worst hit by Mexico’s deepening droughts are peasant farm families, many of them working on communal land, known as ejidos. Most ejidos are already economically unviable, and for some, further drought could be the final straw.

More and more farmers could be forced to leave their land, with the men undertaking the dangerous journey north to the now-closed U.S. border in the hopes of earning cash to send home, while women, old people and children struggle on with failing farms. Without remittances from family in the U.S., many of these farms would have gone bankrupt long ago.

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