BBC NEWS | Science & Environment | Earth population 'exceeds limits' There are already too many people living on Planet Earth, according to one of most influential science advisors in the US government. Nina Fedoroff told the BBC One Planet programme that humans had exceeded the Earth's "limits of sustainability". Dr Fedoroff has been the science and technology advisor to the US secretary of state since 2007, initially working with Condoleezza Rice. Under the new Obama administration, she now advises Hillary Clinton. "We need to continue to decrease the growth rate of the global population; the planet can't support many more people," Dr Fedoroff said, stressing the need for humans to become much better at managing "wild lands", and in particular water supplies. Pressed on whether she thought the world population was simply too high, Dr Fedoroff replied: "There are probably already too many people on the planet." BBC NEWS | Science & Environment | Earth population 'exceeds limits'