Patent Lies Who Says Saving the Planet Has to Cost a Fortune?

One of the nagging issues in the run-up to the Copenhagen climate summit are demands that the US and Europe provide massive aid so poorer countries can buy expensive emissions-free technologies. Activist David E. Martin claims many of the patents for today's low-carbon technologies -- including some used in wind power and hybrid cars -- are already in the public domain.
Von Juliane von Reppert-Bismarck
Many of the technologies in place today that can help slow climate change are already in the public domain.

Many of the technologies in place today that can help slow climate change are already in the public domain.

Christopher Furlong/ Getty Images
Photo Gallery: The Battle over Green Patents
Christopher Furlong/ Getty Images

Fotostrecke

Photo Gallery: The Battle over Green Patents

Photo Gallery: The Battle over Green Patents
Christopher Furlong/ Getty Images

Fotostrecke

Photo Gallery: The Battle over Green Patents

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