Green ammonia fertilizer (Haber-Bosch process powered by renewables or green hydrogen)

Our food system is caught in a destructive cycle. Modern agriculture feeds billions of people, but it's systematically destroying the very resources it depends on — soil, water, forests, and climate stability.

Livestock farming alone uses nearly 80% of agricultural land while producing just 18% of our calories. Industrial crop production relies heavily on fossil fuel-derived fertilizers that pollute waterways and strip soil of its natural fertility. Meanwhile, we're clearing forests at an alarming rate to create more farmland, even as we waste a third of all food produced.

This isn't sustainable. We need technologies that can maintain food security while regenerating the land, reducing emissions, and working within planetary boundaries.

Modern agriculture depends on synthetic nitrogen fertilizer, which is made by combining natural gas with nitrogen from the air in an energy-intensive process. This accounts for about 2% of global energy use and 1.4% of CO2 emissions.

Worse, much of this fertilizer runs off fields into waterways, creating massive dead zones in lakes and oceans where nothing can live. The Gulf of Mexico dead zone, fed by fertilizer runoff from Midwest farms, is larger than the state of Connecticut. We need ways to provide crops with nutrients without fossil fuels or water pollution.

The same chemical process that makes fertilizer today can be powered by renewable electricity instead of natural gas. This green ammonia could eliminate most of fertilizer's carbon footprint while maintaining crop yields.

The technology uses renewable electricity to split water into hydrogen and oxygen, then combines that hydrogen with nitrogen to make ammonia. The challenge is making it cost-competitive with fossil fuel-based fertilizer, which requires cheaper renewable electricity and more efficient electrolysis.