As Nasa prepares to retire its fleet of space shuttles, it is encouraging private companies to build new rockets to get its astronauts into orbit.
Among the firms landing huge contracts to build the next generation of spacecraft is SpaceX.
Science correspondent David Shukman visited the company's rocket factory in California for a look inside the prototype capsule.
Emissions of carbon dioxide (CO2) from fossil fuels and the cement industry scaled a record high in 2010, rocketing by 5.9 percent over 2009 in a surge led by developing countries, scientists reported on Sunday.