1. The document discusses the gap between scientific understanding of climate change and public/policymaker knowledge, and notes that positive climate feedbacks now predominate, risking tipping points that could lead to a dramatically different planet. 2. Paleoclimate proxy records show historical temperature and ice volume fluctuations over millions of years, and ice core data indicates rising CO2, methane, and temperatures since 1880. Climate models project continued warming this century unless additional emissions reductions occur. 3. Several "danger zones" are identified, including ice sheet disintegration raising sea levels, mass species extinctions, and severe regional climate disruptions, underscoring the need for urgent emissions reductions to remain within safer warming limits.