As many of us try to eat healthy, sometimes we may overlook where the food is grown. For example were 20%+ of the soil in china contaminated with toxins in 2005 and way over safe levels- now even more are contaminated. Also india have contaminated soil. A documentary showed a lot of chinese farmers won't even eat their own food they produce because they knew all of the shit inside it !
So beans and rice from these countries may contribute to toxify us, personally I try to stay away from food from these countries and other countries with lot of "black" factories and pollutants. I eat primarly domestic and some european food.