The primary raw material of inorganic fertilizers (artificial fertilizers) is petroleum (oil). Artificial fertilizers do not contain *all* essential micro nutrients (trace minerals). To feed plants and trees artificial fertilizers is much like feeding humans refined sugar and other highly processed food. Inorganic fertilizers are used immensely in the industrial world to grow all kinds of plants, including of course the ones used to feed livestock and ourselves.
Conventional produce grown with artificial fertilizers are prone to disease due to consequential lack of natural defenses against fungus, insects and other potential parasites. This is the reason why pesticides such as fungicides and insecticides are often used on conventional produce. The use of pesticides decreases further down the low nutritional potential of conventional produce by increasing their relative toxicity, because the pesticides are absorbed to some degree onto and inside the produce.
To buy organic produce is to vote for increasing the quality of the top soils. To buy organic produce is to vote for the purification of groundwater, rivers and lakes. To buy organic produce is to vote for the use of natural fertilizers and other natural growth techniques only.
To eat organic produce is to eat healthy produce - healthy for our Earth, healthy for our societies and healthy for our own body.