The introduction of genomics, which uses DNA analysis to predict a calf's future traits, has revolutionized dairy breeding. The rate of genetic improvement jumped from approximately $13 per cow per year to $100. This leap in efficiency allows for rapid selection for traits like higher yields and disease resistance.

To address its largest emissions source (Scope 3), Mars goes beyond farmer engagement by re-engineering its products. Scientists use a dedicated IT system to reformulate pet food, optimizing for both animal nutrition and environmental impact by prioritizing lower-impact proteins like poultry over beef, tackling the problem at the R&D level.

The debate over food's future is often a binary battle between tech-driven "reinvention" (CRISPR, AI) and a return to traditional, organic "de-invention." The optimal path is a synthesis of the two, merging the wisdom of ancient farming practices with the most advanced science to increase yields sustainably without degrading the environment.

Dairy farms now derive significant income from breeding cows for the beef industry, not just for milk production. Leveraging genetic technologies like genomics and gender-sorted semen allows farmers to strategically produce high-value beef calves, transforming a secondary income source into a major revenue stream.

Whey, once a low-value byproduct of cheesemaking that was often fed to pigs or spread on fields, is now a highly profitable product. Modern cheese plants are designed specifically to harvest and process whey into high-demand whey protein isolates, fundamentally changing the business model of cheese production.

Contrary to the narrative of decline, overall U.S. dairy consumption per capita is at its highest level in 40 years. While fluid milk consumption has dropped, this is more than offset by the booming popularity of value-added products like cheese, Greek yogurt, and cottage cheese.

The way we grow food is a primary driver of climate change, independent of the energy sector. Even if we completely decarbonize energy, our agricultural practices, particularly land use and deforestation, are sufficient to push the planet past critical warming thresholds. This makes fixing the food system an urgent, non-negotiable climate priority.

Despite shelves stocked with heirloom tomatoes and exotic grains, our core food supply is dangerously uniform. For example, 90% of U.S. milk comes from a single cow breed descended from just two bulls, and half of all calories consumed globally come from just three grasses.

Unlike wildlife conservation, which prioritizes non-interference, preserving agrobiodiversity requires consumption. Reviving, cultivating, and herding ancestral grains and livestock creates a market and an economic incentive for their survival, following the principle: "to save it, you've got to eat it."