Machine generated contents note: -- ACKNOWLEDGEMENTS -- PREFACE: Why You Need To Know About Climate Change -- I. Climate Science Basics -- What is the greenhouse effect and how does it warm the Earth? -- Why are scientists so certain the climate system is warming? -- How does global warming increase sea levels and what has been observed to date? -- Where does most of human-caused warming go? -- What fraction of recent global warming is due to human causes vs. natural causes? -- How certain are climate scientists that humans are the primary cause of recent warning? -- How do scientists know that recent climate change is primarily caused by human activities? -- Why has the climate changed in the past, before there were human-caused greenhouse gas emissions? -- What are the climate system's amplifying feedbacks, which turn a moderate initial warming into a big ultimate warming? -- Is the current level of atmospheric CO2 concentration unprecedented in human history? -- Are recent climatic changes unprecedented? -- Has recent human-caused climate change been occurring faster or not as fast as scientists predicted? -- Is there a difference between global warming and climate change? -- What are the sources of the most important human-caused pollutants that drive global warming? -- How does deforestation contribute to warming? -- What is Global Warming Potential and why it is different for various greenhouse gases? -- Why does the rate of warming appear to vary from decade to decade? -- Has global warming slowed down or paused in recent years? -- Can we reach a point where emitting more CO2 into the air will not cause more climate change? -- Have we already crossed tipping points (points of no return) in the climate system? -- II. Extreme Weather and Climate Change -- What is the difference between weather and climate? -- Which extreme weather events are being made worse by climate change, and which are not?