WHO recently (Dec. 2014) announced that if the soil depletion does not stop, in 60 years most of the world’s soil will be depleted of nutrients. They also mentioned that it take some 1000 years to for the top 3 cm (1.2 inches) of soil to recover. At this moment I do not see any sign of change to stop this problem, so I believe that for most of us living in big cities our best choice to get the most of the food we eat.
For example: Apple
Mineral 1914 1963 1992 % change
Calcium 13.5mg 7mg 7mg -48%
Phosphorus 45.2mg 10mg 7mg -85%
Iron 4.6mg 0.3mg 0.18mg -96%
Potassium 117mg 110mb 115mg -2%
Magnesium 28.9mg 8mg 5mg -83%
Luckily the full body PEMF mat can help with nutrient absorption and I think we all need to absorb as much as we can from food.
One last note: it has been observed that organic food is not much better due to soil depletion. People buy them for not is what is in them, but for what is not: no pesticides, genetic engineering etc.