Finding a "Green" battery

Agencies such as ARPA-E (Advanced Research Projects Agency - Energy) provide the answer to Thomas Friedman's "Code Green". New sources of alternative energy must be discovered to replace the worlds current fossil fuels and oils, in order for our generation to see the decline of Global Warming.
                "Most research on renewable energy has focused on replacing the electricity that now comes from burning coal and natural gas...A lot of problems could be solved with a renewable replacement for oil-based gasoline and diesel in the fuel tank — either a new liquid fuel or a much better battery."

Agencies such as ARPA-E donating money towards research is the only way the world will overcome the problem Global Warming presents to our environment. It is vital that scientists come up with an alternative to fossil fuels, that is energy efficient, affordable, and environmentally friendly. Investments in Green technology must continue in order to find a renewable, clean resource that will not harm our environment.