A new proposal by AMO, the thinktank arm of architect Rem Koolhaas's firm OMA, has a plan to make the United States carbon-neutral by 2050. The plan calls for a shift to renewable energy that takes advantage of U.S. geographic diversity—solar for some areas, hydro for another—in other words, no one-size-fits-all solution. This proposal has been entered into GE's Powering the Grid Ecomagination Challenge, which is awarding $200 million to the best ideas for a next-generation power grid.
The U.S. video is pretty short, so for a more detailed proposal, check out AMO's European plan, unveiled earlier this year. This plan estimates that Europe could use existing technology to reduce its greenhouse gases by 80%.
Finally, this video outlines a year-by-year scenario from now until 2050 outlining what the shift to clean energy in Europe would look like. The world's first zero-carbon commercial airliner by 2030? Doesn't sound all that far off.