Check the water from the tap for sewage I think they have stopped putting fluoride in the water as well as radiation in bottled water as well as tap. Also grade A drugs.

Homework: Learn where rain comes from a lot more to it than just clouds. What is the water table? Where do lakes and rivers come from? How much of the rain comes from the Ocean? How much radiation is in the Ocean and sewage? How clean is the rain?

WARNING: Trading can seriously damage your wealth. Always read the terms and conditions of your broker!