Make Helium and Phosphorus* According to this,
http://www.cracked.com/article_19048_6-important-things-you-didnt-know-were-running-out-of.html, the world is running out of both of these elements, as well as clean water.
* I think the water problem will be easier to deal with. But it seems we may need technology that can provide enough helium and phosphorus, if the article is correct.
* I believe the solution is transmutation. Helium has 2 protons and 2 neutrons. Phosphorus has 15 protons and 16 neutrons.
Helium* Going to my list of transmutation formulae at
http://www.thunderbolts.info/forum/phpBB3/viewtopic.php?f=3&t=209#p2271, I see that there are quite a few
possible ways to get helium from other elements. One would have to look up the literature on transmutation to see if an easy means is known, but, if there is no info available, then experimenting would have to be done. Some of the elements that could be tried are: Boron [yielding He + Li]; Oxygen [= He + C]; Sodium [= He + F]; Magnesium [= He + Ne]; Aliminum [= He + Na]; Silicon [= He + Mg]; etc.
PhosphorusBut it looks like the best bet might be chlorine, which could produce both
phosphorus and helium. Other possible sources for phosphorus would be Fluorine + Carbon, Neon + Boron, Sulfur - Hydrogen, Magnesium + Lithium, Aluminum + Helium.
* Do we have a volunteer to do this?
Let's see if we can get helium from lithium. Lithium has 3 protons and 4 neutrons