Alternative Energy Sources.

Five years ago, advocates of fuel cells finally had a striking poster child for commercial building applications, an installation by a speculative developer in a high-rise being erected in Midtown Manhattan in New York. Fuel cells are tantalizing because they hold the promise of anchoring a clean and sustainable energy system that will lessen the massive carbon dioxide and other greenhouse gas emissions that have been linked to climate change. To serve a role as a source of emergency generation, the fuel cell would require "instant on" capability that generally calls for the use of direct hydrogen fuel.