This summer, 2011, due to changes in regulations in Europe, consumers will have a more difficult time finding natural sunscreen protection since most manufacturers of natural sunscreen have left the market. The new European regulations for sunscreens now require certain levels of UVA protection that are challenging to achieve with all natural ingredients
here are some links I've found to some of the facts
http://www.foe.org/healthy-people/nanosunscreens
http://www.thedailygreen.com/living-green/blogs/organic-parenting/safe-sunscreen-47051804
http://www.ethicalconsumer.org/FreeBuyersGuides/healthbeauty/sunscreen.aspx
more facts form some companies offering non nano products
http://www.ulula.co.uk/blog/where-are-the-weleda-edelweiss-suncream-and-sun-protection-products/
http://www.truenatural.com/education/item/181-new-european-spf-requirements-force-many-natural-brands-to-pull-sunscreen-off-shelves.html