By Susan Barnett
http://stream.publicbroadcasting.net/production/mp3/wamc/local-wamc-822165.mp3
Hudson Valley, NY – Necessity is the mother of invention - and that old chestnut is taking on more significance as the White House looks for ways to jumpstart the economy and create a new age of green energy. Hudson Valley bureau chief Susan Barnett profiles one inventor who's hoping to get the president's attention.