Ex-Nasa scientist: 30 years on, world is failing 'miserably’ to address climate change

James Hansen, who gave a climate warning in 1988 Senate testimony, says real hoax is by leaders claiming to take action

Thirty years after a former Nasa scientist sounded the alarm for the general public about climate change and human activity, the expert issued a fresh warning that the world is failing "miserably" to deal with the worsening dangers.

While Donald Trump and many conservatives like to argue that climate change is a hoax, James Hansen, the 77-year-old former Nasa climate scientist, said in an interview at his home in New York that the relevant hoax today is perpetrated by those leaders claiming to be addressing the problem.