As noted here before, getting humanity off fossil fuels requires more than replacing our electricity generation and transport systems with climate-safe alternatives. We also need to decarbonize the process of producing food and raw materials. Since most fertilizer is made from natural gas, engineering plant-fungal symbiosis to fix atmospheric nitrogen could be a promising route forward.
Symbiosis
Fungi, it turns out, are canny traders of nutrients to plants
When phosphates are scarce, their price goes up