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.
Let's finish off the top row of the periodic table with a short look at helium (He). You'll find it on the upper right of the table as element number two. It is the first in the family of noble gases. Helium is the other very simple element that you will find with one atomic orbital. The chemists Lockyear and Frankland named the element.