• CdTe is uniquely capable of producing low cost solar modules, making widespread, cost-effective solar electricity a reality. Its physical properties are optimal for converting sunlight into electricity, resulting in highly efficient photovoltaics with thin (< 3 micron) semiconductor layers. CdTe is a robust material with the demonstrated capacity for high volume, low cost production.
  
  
• CdTe is a semiconductor made by transforming cadmium and tellurium from their elemental forms into a stable semiconductor. The cadmium in First Solar's CdTe is derived from zinc smelting waste. The “up-cycling” of cadmium into safe, cost effective solar electricity not only reduces the toxic effects of fossil fuel generation but prevents potentially dangerous elemental cadmium from entering the environment.

For these reasons, research from the U.S. Department of Energy's Brookhaven National Laboratory concluded:

Large-scale use of CdTe PV modules does not present any risks to health and the environment, and recycling the modules at the end of their useful life completely resolves any environmental concerns. During their operation, these modules do not produce any pollutants, and furthermore, by displacing fossil fuels, they offer great environmental benefits. CdTe PV modules appear to be more environmentally friendly than all other current uses of Cd.

Source: " RENEWABLE & SUSTAINABLE ENERGY REVIEWS", Vol 8, 2004, pp 303 – 334, V M Fthenakis, “Life Cycle Impact Analysis of Cadmium in CdTe PV Production”, with permission from Elsevier