> why not produce plants with, e.g., much bigger seed heads? The energy to produce the biomass in the seeds still has to come from somewhere, from photosynthes

> why not produce plants with, e.g., much bigger seed heads? The energy to produce the biomass in the seeds still has to come from somewhere, from photosynthesis. They cannot create energy from nothing by just changing a couple of genes. Some people are working on a more energy-efficient version of photosynthesis, but progress has not been fast.