The second issue of Food Security is now published, and is free online. It documents some of the multiple causes of food insecurity.
Helium can be found in underground deposits in the earth. Helium can also be found in stars and other planets. The helium underground - and extracted from natural-gas - is a by-product of the natural radioactive decay of uranium, though is far too stable to be radioactive itself. It also occurs in very small amounts in the atmosphere.
in natrual gas - it is important that we save this natural resource. Generally Helium is found underground is natural gas pockets much like oil. Its usually mixed with other gases like methane and nitrogen and needs to be separated out. The stores that fill helium balloons have the tanks. It's at the floral department in our grocery store and many of the florists have the tanks.