This document discusses the challenges of global warming and climate change. It provides evidence that global temperatures are rising faster than expected, with 2010 being the warmest year on record. It notes that CO2 levels are rising rapidly due to human activity since the Industrial Revolution. Climate models predict further warming of 5-11°C by 2100, which would melt ice sheets and raise sea levels significantly. Urgent action is needed to transition to renewable energy and reduce greenhouse gas emissions to avoid potentially catastrophic climate change impacts.