The use of chemical fertilizers and pesticides is without any doubt necessary to feed the world's population, but it also true that this practice is causing enormous environmental problems. Every year an increase in the order of 4% is recorded worldwide, but the resources of some chemicals like Potassium are non renewable and won't last for more than 100 years.
Agriculture is also the biggest user of potable water and most of it is lost due to poor soils' retention.
Consumers are aware of these problems and therefore the request of "organic" labelled fruit and vegetables is raising. Usually this food is better cultivated in terms of genuinity and with stronger regulations regarding chemical use, but this often doesn't mean better for the environment and the soil.