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Modern agriculture is totally dependent on oil, so current trends cannot continue. Part of California's central valley is being lost to salt accumulation from bad irrigation, and many other productive areas are dependent on aquifers that are quickly being depleted. Desalinization is energy-intensive, as would be running rivers backward to the fields.
GM crops are less productive than traditional seeds - they are designed to sell chemicals and promote a monopoly, while causing health problems.
Aquaculture is dependent on converting less-desireable ocean species to salmon, etc, at a great loss in protein overall, while the farms spread disease and overfishing, ocean acidification, etc, are only helping the jellyfish. My own well was ruined by nearby aquaculture hatchery tanks when I lived on the coast. The fish farms in Chile crashed recently, and the ones in BC are always in trouble, or making trouble for the wild population.
If the whole world copies our high-energy, non-sustainable practises, climate chaos is certain. What would really ease the situation is more awareness that vegetarians who get a good variety of plants live longer, healthier lives on a small fraction of the land needed to raise and slaughter animals for food.
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