The latest evidence is that scientists have tweaked plant genes to make photosynthesis more productive. Without this move, some 660 million of us will be in danger of starvation or malnutrition in the near future.
How about we gradually reduce our numbers, stop over fishing, stop trashing the environment, stop pretending that we can all live as we do today with our cars, aircon, CH, strawberries in February, flying everywhere to get temps we call "heatwaves" back home?
The Earth is running out of resources. We can do all the tweaking we like, but eventually there will be no more to be done. We are fast approaching that time.