Scientists from the California Institute of Technology (CIT) have developed a new solar cell technology that they say absorbs up to 96 percent of “incident” light. Experimental tests revealed that the new cells operate at around a 90 percent quantum efficiency rate. Because they are made of plastic, they could significantly reduce the overall cost of photovoltaic cells as well.
Do not get bottled water Instead of bottled water get a reusable container to carry water. Also you can get a filter to make your home tap taste more like bottled water. It is definitely more cost efficient.