In every generation citizens of the world step forward to warn us that the end is near.
In the past.
Dr James Hansen, 2009.
Barack Obama has only four years to save the world. That is the stark assessment of Nasa scientist and leading climate expert Jim Hansen who last week warned only urgent action by the new president could halt the devastating climate change that now threatens Earth. Crucially, that action will have to be taken within Obama's first administration, he added.
Rajendra Pachauri, 2007.
"If there's no action before 2012, that's too late," Pachauri said. "What we do in the next two to three years will determine our future. This is the defining moment. If you look at the scientific knowledge things do seem to be getting progressively worse. So you'd better start with the interventions even earlier. Now."
Andrew Marshall, 2004.
Climate change over the next 20 years could result in a global catastrophe costing millions of lives in wars and natural disasters. A secret report, commissioned by influential Pentagon defence adviser Andrew Marshall, warns that major European cities will be sunk beneath rising seas as Britain is plunged into a 'Siberian' climate by 2020. Nuclear conflict, mega-droughts, famine and widespread rioting will erupt across the world.
Greta Thunberg's father revealed he feared depression would kill her before she launched her 'climate crisis' campaign as the teenager blasted Donald Trump and insisted meeting him would be a 'waste of time'. Svante Thunberg told his 16-year-old daughter it was 'a bad idea' to lead the campaign to halt global warming – but now believes it 'saved her' after she stopped eating and talking for months during a long bout of depression.
“This is not the stuff of fiction or some far off threat. This is a clear and present danger to life on Earth. Our goal is to stir action. I don’t think it’s unreasonable to project what the world might look like and what large parts of the globe already look like.”
"More devastating fires in California. Persistent drought in the Southwest. Record flooding in Europe and Africa. A heat wave, of all things, in Greenland. Climate change and its effects are accelerating, with climate related disasters piling up, season after season. Seas are warming and rising faster, putting more cities at risk of tidal flooding or worse. Glaciers are melting at a pace many researchers did not expect for decades. The amount of Arctic sea ice has declined so rapidly that the region may see ice-free summers by the 2030s."