Circular Farming: Better Food, Healthier Planet

Forget the headline battles over “cow versus climate.” We dig into how livestock, managed within a circular bioeconomy, can actually reduce risk, recover nutrients, and improve the food we eat. With Professor Michael Lee of Harper Adams University, we connect the dots between soil carbon, methane chemistry, and what ends up on your plate, showing why measuring only gross emissions per kilogram misses the true picture of sustainable dairy and beef.

We start by reframing circular farming: crops generate non‑edible biomass and the food industry creates co‑products; ruminants turn those streams into milk and meat while producing organic manures that, with new stripping and separation technologies, return nitrogen and phosphorus to the fields that need them. That reduces dependence on mined phosphate and fossil‑fuel fertiliser and strengthens soil health and biodiversity. We also unpack the geopolitics of nutrients, from export controls to the hidden carbon cost of extraction, and why better manure management is both an agronomy win and a climate hedge.

Then we get precise about methane. Biogenic methane sits in a short‑lived natural cycle; thermogenic methane from fossil sources adds new carbon to the atmosphere. Agriculture must cut emissions, and can, through genetics, feed, and efficiency. But farms are too often judged on gross emissions while their removals through soils, hedgerows, and trees are booked elsewhere. Case studies from Ireland show how net accounting can reveal major improvements and, in some systems, net‑zero performance. The takeaway is clear: measure net, reward verified removals, and avoid a carbon‑only lens that ignores biodiversity, water, and rural livelihoods.

Finally, we get practical about what to eat. We don’t eat by the kilogram; we eat for nutrients. Animal‑source foods provide highly bioavailable protein and hard‑to‑get micronutrients, while plant foods supply the fibre most of us lack. Ultra‑processed “plant” proteins often strip out that fibre. A smarter plate is plant‑rich, fibre‑dense, and includes modest amounts of unprocessed dairy and meat. Using more of the carcass, including offal, cuts waste and boosts nutrient density.

If this conversation changed how you think about livestock, sustainability, and nutrition, follow the show, share it with a friend, and leave a review. Your feedback helps more people find evidence‑based farming stories that matter.

This was recorded in October 2025, and all information was correct at the time of recording.

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