@ valleyfiah- The green revoultion has been beneficial to humanity in many ways, but that does not make it perfect, nor does it make up for the agricultural shortcomings that pelestears is talking about. The effects of the green revolution on the past few decades are nothing when compared to the challenges of maintaining future populations into the unforeseeable future. The human population will likely top out somewhere between 9.8 to 12.1 billion people and all but a few of the planets biogeochemical systems are at or above their tipping point. We are experiencing overshoot in almost all the planets major life support systems, meaning that we are living on borrowed time.
The green revolution has created a food economy where the poorest nations are dependent on the industrialized world to eat, where bioengineering has been moving forward nearly unregulated because of a lack of institutional capacity to deal with scientific advances, and a system where energy has started to compete with food for crop space. While the green revolution cannot be demonized, we cannot sit around on our thumbs thinking that everything is all right. We need to alter the current system so that it is based on objectives rather than past performance.