„[W]ithout bolder action, our children won’t have time to debate the existence of climate change. They’ll be busy dealing with its effects: more environmental disasters, more economic disruptions, waves of climate refugees seeking sanctuary.“

— Barack Obama

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„As scientists, we understand the dangers of nuclear weapons and their devastating effects, and we are learning how human activities and technologies are affecting climate systems in ways that may forever change life on Earth. As citizens of the world, we have a duty to alert the public to the unnecessary risks that we live with every day, and to the perils we foresee if governments and societies do not take action now to render nuclear weapons obsolete and to prevent further climate change… There’s a realization that we are changing our climate for the worse. That would have catastrophic effects. Although the threat is not as dire as that of nuclear weapons right now, in the long term we are looking at a serious threat.“
— Stephen Hawking