"The Industrial Era is ending. Its extraordinary successes—advances in literacy, life expectancy, human rights, and technology—have propelled us headlong into a myriad of side effects: food and water shortages, cyclonic destruction, prolonged drought and rising sea levels. To delay acknowledging the need for lifestyle and business changes—'The Necessary Revolution'—risks our very survival. What only a couple of decades ago was still a vigorous scientific debate has become as close to a consensus as scientific communities ever achieve: human-induced climate change from greenhouse gases concentrating in the atmosphere has reached a threshold of significant social and economic impact—and we are only now at the start of experiencing the effects. Stabilizing atmospheric carbon dioxide will require a profound reversal: a 60–80% reduction in growing worldwide emissions in the next twenty years. This is the '80–20 Challenge,' and this manifesto presents inspiring, real-life examples of how this is starting to happen."