The author needs to acknowledge that as our environmental consciousness grew (1970's to today) and developed into our current environmental regulatory climate, all industries (from large agriculture to mom&pop stores) changed their businesses to embrace new environment regulations and deal with past trangressions or they closed-down. Most large-scale agriculture and most mom&pop gas stations closed.
Unfortunately the demise of large scale agriculture will also yield the following:
(1) Urbanization of former AG lands (hello more suburbs, Koa Ridge and Kam/Gentry development Mauka of Ka Uka Blvd, Pamoho estates)
(2) Larger non-point pollution sources from 'gentlemen' farmers and new urbanization (e.g. uncle pouring unused solvents into the backyard puka)
(3) Buy, hold, re-zone, and develop (yes bulldozing & red dirt run-off occurs during construction of these suburbs)
Agriculture incorporating 'enforced' best management practices would provide:
(1) storm water control of vacant agricultural lands (brown water runoff entering oceans),
(2) keep the last portion of Oahu rural character intact
(3) reduce Hawaii's reliance on imported food and our collective carbon footprint (i.e. Matsons fuel to ship in California avocados)
In short, a good solution would be to keep the AGRICULTURAL lands zoned and used for actual agriculture, and not for land speculation for urban-development.