Gene-edited fungus cuts meat production emissions by 60 percent

Scientists in China have used CRISPR gene editing to create a fungus that produces meat-like protein with a fraction of the environmental cost. The modified strain uses 44% less sugar to grow, cuts greenhouse gas emissions by up to 60%, and tastes remarkably similar to actual meat — all without inserting foreign DNA into the organism.

The work, published in Trends in Biotechnology, tackles a real constraint: animal agriculture generates about 14% of global greenhouse gas emissions while consuming vast amounts of land and fresh water. Fungus-based proteins have emerged as a practical alternative, but they've had a problem. The fungus Fusarium venenatum, which already has an approved track record in the UK, China, and US, grows slowly and requires heavy inputs of nutrients and sugar. Its thick cell walls also make it harder for humans to digest.

Xiao Liu's team at Jiangnan University decided to test whether two precise genetic tweaks could fix both issues. They removed genes responsible for chitin synthase — a protein that builds cell walls — and pyruvate decarboxylase, an enzyme involved in metabolism. The result was a thinner-walled fungus that produces protein 88% faster while needing far less feedstock.

The real-world impact

Here's where it gets concrete. When researchers modeled production across six countries with different energy sources — from renewable-heavy Finland to coal-dependent China — the modified fungus, called FCPD, outperformed the original strain in every scenario. Against chicken production in China specifically, FCPD required 70% less land and reduced freshwater pollution risk by 78%.

This matters because the global food system is under pressure. Population growth and climate impacts are straining resources, and alternative proteins aren't just a niche concern anymore — they're becoming infrastructure. The fungus grows in large industrial tanks rather than sprawling farms, which means it can be produced near cities where people actually live, cutting transportation emissions and waste.

The gene editing approach is also notable for what it doesn't do. Unlike some biotechnology solutions, CRISPR-edited organisms don't carry foreign DNA sequences — the edits are deletions, not insertions. That distinction matters for regulatory approval and public acceptance, especially in regions cautious about genetic modification.

What happens next is partly about scaling and partly about consumer adoption. The science works. The environmental math is sound. The remaining question is whether production can ramp up to meet demand while regulators and markets catch up to what's possible.