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.
Helium is found everywhere in the Universe and is the second most common element, just behind hydrogen. As far as we're concerned, helium is a happy element. It is inert, because its outermost electron orbital is full with two electrons. You can also find helium in compressed air tanks, lasers, and as coolants in nuclear reactors.