So, as an amateur baker (though I'm learning), I've had a good deal of fun in a miniature extended chemistry lesson regarding yeast and all its wonders.  Otherwise, though, I have a lifelong lay devotion to cosmology (daughter of an astrophysicist, go figure), and spend hours reading various science news.  However, in the archives of one of my favorite publications, New Scientist, I unearthed this brief article which I find terrifying...  

 http://www.newscientist.com/blog/environment/2008/07/why-global-warming-is-bad-for-bread.html

Apparently, according to some studies last year, rising carbon dioxide in the planet's atmosphere may lead to lower-gluten wheat which in turn leads of course to bread disasters!  Noooo....  I'm so glad I recycle!  Anyhow, I thought this might be interesting to others, too...