1. Climate change is no longer a doomsday prophecy, it’s a reality. -Astrid Nøklebye Heiberg
2. Unless we take action on climate change, future generations will be roasted, toasted, fried and grilled. -Christine Lagarde
3. There is no question that climate change is happening; the only arguable point is what part humans are playing in it. -David Attenborough
4. Climate change is sometimes misunderstood as being about changes in the weather. In reality it is about changes in our very way of life. -Paul Polman
5. Climate change is the Everest of all problems, the thorniest challenge facing humankind. -Lewis Gordon Pugh
6. Climate change respects no borders. -Margaret MacMillan
7. Climate change, if unchecked, is an urgent threat to health, food supplies, biodiversity, and livelihoods across the globe. -John F. Kerry
8. Climate change isn’t something people get to choose to believe or not: it’s happening. -Cary Kennedy
9. When you think about climate change, that means that we won’t have an Earth to be lonely on. -Jim James
10. In the end, climate change is a math problem. -Bill McKibben
11. The issue of climate change is one that we ignore at our own peril. -Barack Obama
12. Climate change is the mother of all hysterias of the Left. -Dennis Prager
13. People working on climate change should prepare for catastrophic success. -David Titley
14. Climate change is real and it is caused to a significant extent by human activity. -Julia Gillard
15. Climate change is such a consequential crisis to everybody in the world. -Hillary Clinton
16. No country can solve climate change alone, we have to take global measures. -Jose Mujica
17. Human-caused climate change threatens almost every aspect of human existence. -Alan Lowenthal
18. Climate change is the biggest threat to our chances of winning the fight against hunger. -Winnie Byanyima
19. Climate change is, simply, the greatest collective challenge we face as a human family. -Ban Ki-moon
20. Climate change isn’t a distant threat. It’s already changing the way we live. -Jeff Orlowski
21. Climate change involves fundamental choices about how we want to live and what kind of world we want. -Dale Jamieson
22. Climate change is probably the greatest long-term challenge facing the human race. -Tony Blair
23. Climate change is a complex problem with no central lever, and with unequal distribution of resources. -Seth Priebatsch
24. Climate change is part of the normal order of things, and we know it was happening before humans came. -Freeman Dyson
25. Climate change is a fact. Its consequences, damages and costs are already being felt around the globe. -Heinz Fischer
26. Tackling climate change is a collective endeavour, it means collective accountability and it’s not too late. -Christine Lagarde
27. The window of opportunity to avoid dangerous climate change is closing more quickly than previously thought. -David Miliband
28. Climate change is a terrible problem, and it absolutely needs to be solved. It deserves to be a huge priority. -Bill Gates
29. By looking at climate change as a clean energy generation problem, we’re setting ourselves up not to solve it. -Alex Steffen
30. Global climate change needs global action now. The alarm bells ought to be ringing in every capital of the world. -John Gummer