Google Backs Telangana Rice Farmers With Methane-Credit Purchase

The program would pay farmers to periodically drain rice paddies, linking lower water demand to credits measured over two different warming periods.

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Google Backs Telangana Rice Farmers With Methane-Credit Purchase
Google Backs Telangana Rice Farmers With Methane-Credit Purchase

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Google plans to buy methane-reduction credits from a rice-farming program in Telangana, India, that will pay tens of thousands of smallholder farmers to change how they irrigate their fields. Instead of keeping paddies continuously flooded, farmers will periodically drain them and then reflood them—a practice called Alternate Wetting and Drying, or A-W-D. The idea is that interrupting the flooding also interrupts the soil conditions that produce methane, while reducing the amount of irrigation water needed. Mitti Labs will combine farmer support and direct payments with NASA-enabled satellite monitoring and field measurements to verify whether the practice is actually being adopted and what impact it has. Google says the program could conserve billions of gallons of water across regional basins while maintaining crop productivity, but those are expected outcomes, not results already reported. The credit accounting is especially important here. Mitti projects roughly three million tonnes of carbon-dioxide equivalent using a 20-year warming measure, compared with one million tonnes using the conventional 100-year measure. The difference reflects methane’s stronger warming effect over the near term. Google calls this the largest publicly announced purchase of rice-cultivation methane credits. It says shorter-lived emissions could be matched with these credits, or eventually replaced with carbon removals as their atmospheric effects decline. The key constraint is that the headline volumes remain projections, and depend on which warming horizon is used.

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Google has agreed to buy methane-reduction credits from Mitti Labs’ rice-farming program in Telangana, which will help tens of thousands of smallholders adopt Alternate Wetting and Drying instead of continuous flooding. The deal links farm payments, satellite and field verification, water conservation, and corporate emissions accounting. Mitti estimates about 3 million tonnes of CO2e under a 20-year warming horizon,...

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    Google calls the agreement the largest publicly announced purchase of rice-cultivation methane credits.

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    Mitti’s projected impact is roughly 3 million tonnes of CO2e over 20 years, or 1 million tonnes over 100 years.

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    NASA-enabled satellite monitoring will be combined with field measurements and farmer support to verify adoption and impact.

Google is partnering with Mitti Labs to help rice farmers in Telangana adopt a different irrigation routine: periodically draining and reflooding paddies instead of keeping them continuously flooded. Google says the program is expected to cut methane emissions and irrigation demand while paying participating farmers, turning a change in field management into a source of carbon credits.

Changing the conditions beneath a rice field

The practice is called Alternate Wetting and Drying, or AWD. Rice fields are commonly kept flooded, but Mitti’s program asks farmers to drain and later reflood them. Google says that interrupts the soil conditions that generate methane while lowering the need for irrigation water.

The program is expected to reach tens of thousands of smallholder farmers, according to Google. Mitti combines the practice change with direct payments to participants. Its verification approach uses NASA-enabled satellite-based monitoring alongside an on-the-ground network that measures the project’s impact and supports farmers as they adopt AWD.

Google estimates that, once fully implemented, the initiative could conserve billions of gallons of water across regional basins in India while maintaining crop productivity. Those are expected outcomes, not results reported from the project.

Alternate Wetting and Drying in rice paddies in Telangana
The initiative plans to introduce Alternate Wetting and Drying in rice paddies in Telangana. Source: blog.google.

Why the accounting period changes the result

Mitti’s two estimates reflect different ways of looking at methane. Its 20-year measure gives more weight to methane’s stronger warming effect in the near term; the conventional 100-year measure produces the lower figure. The project’s credited impact therefore depends on the time horizon used.

Google says that if it uses the credits to counterbalance emissions, it will match them against shorter-lived emissions in its own footprint or replace them with carbon removals as their atmospheric impact expires.

Sources

  1. blog.google5 new ways Google is advancing sustainable innovation in India

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