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.
The law stipulates that the US National Helium Reserve, which is kept in a disused underground gas field near Amarillo, Texas â by far the biggest store of helium in the world â must all be sold off by 2015, irrespective of the market price.