What is the key concept for this section? Define and distinguish between weather and climate. Summarize the trends in atmospheric temperature changes over the past 900,000 years, 10,000 years, 1,000...

What is the key concept for this section? Define and distinguish between weather and climate. Summarize the trends in atmospheric temperature changes over the past 900,000 years, 10,000 years, 1,000 years, and since 1975. Define greenhouse gases and give four examples. How do scientists get information about past temperatures and climates? What are three major conclusions of the world’s top scientists regarding climate change? List eight pieces of evidence that support those conclusions.