"We are endangering our health by not adopting the metric system in this country."
There is a reason science and medicine use metric measurements exclusively. It's less confusing. In medicine, it proves to be safer, too. With the American public using less accurate customary units, like teaspoon and tablespoon for liquid measures, there is a greater danger of incorrect dosing.
Bottom line, the sooner we come around to using metric measurement universally, the better off we will be.