James Hansen

"The health of the planet is inseparable from human health."

"We must teach the next generation to be guardians of the Earth."

"The greatest moral failure would be to understand and do nothing."

"Nature is the ultimate accountant - it will balance the books eventually."

"We are not powerless - we are simply choosing not to act."

"The science is sound, the stakes are high, and the time is short."

"Our legacy will be determined by how we respond to this challenge."

"We must build a future where human flourishing and environmental health go hand in hand."

"The most urgent question is not whether we can afford to act, but whether we can afford not to."

"We are stewards of a gift we did not earn and do not own."

"The climate crisis demands leadership from every sector of society."

"We cannot continue to treat the atmosphere as an open sewer for greenhouse gases."

"The path forward requires both scientific understanding and moral courage."

"Every nation must be part of the solution - we all share the same atmosphere."

"The most important resource we have is the will of the people to demand change."

"We are writing the history of the planet with our choices today."

"The future is not predetermined - it is the result of the choices we make now."

"We have a very brief window of time to deal with climate change and avoid the worst impacts."

"The great tragedy of the climate crisis is that three and a half decades of warnings have gone unheeded."

"Young people have every right to be angry about the future we're leaving them."

"If we continue on the current path, we will hand young people a situation that is out of their control."

"The evidence is overwhelming that we must act on climate change now."

"We need to transform our energy systems fundamentally."

"Economic growth cannot be the primary goal when we're destroying the planet."

"The fossil fuel industry has successfully delayed climate action for decades."

"We must leave fossil fuels in the ground."

"Climate change is a moral issue, not just an environmental one."

"The next decade will determine the course of human civilization for centuries."

"We need a fee on carbon that is honest about the true cost of emissions."

"Young people will face the consequences of our climate inaction."