Mexico's President Felipe Calderon (left) starts a wind turbine that will help power the United Nations Climate Change Conference in Cancun. Officials will spend the next two weeks debating how to mobilize money to cope with climate change as temperatures climb, ice melts and seas rise.
The deep-water-research submarine Alvin is launched from Atlantis. Scientists are studying how ecosystems in the Gulf of Mexico may have been affected by the Deepwater Horizon oil spill.
A hybrid solarized gas turbine power station owned by AORA Solar, a new Israeli company pushing solar hybrid technology, sits in the southern Israeli kibbutz of Samar.
David Buimovitch/AFP/Getty Images