For the traveler crossing the valley, the air smells more like a chemical plant than a farming region. Severe asthma has become ... Agribusiness has waxed fat upon fertilizers, soil fumigants, growth hormones, herbicides, defoliants, fungicides, pesticides, ... and chemical-intensive food production. But the states short-term success is precisely why its future is in doubt. ...

But some experts think that the superweeds it breeds will just require more chemicals. ... which was one of two ingredients in the powerful defoliant used in the Vietnam War called Agent Orange). And on Wednesday, the ...