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Explain how studying ice cores and ocean sediment cores can greatly extend our knowledge of the Earth’s past temperatures.

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The four most abundant greenhouse gases are water vapor, carbon dioxide, methane, and ozone. Explain how human activity increases the amount of each of these in the atmosphere. What is the mechanism by which these gases produce the greenhouse effect?
Glacial-interglacial cycles have occurred many times before significant human activity on Earth. Why did they occur? Does this pattern provide a logical basis to dispute the anthropogenic explanation of current climate change? Explain your answer.

Explain how studying ice cores and ocean sediment cores can greatly extend our knowledge of the Earth’s past temperatures. Why is this information useful in evaluating the impact of human beings on climate change?
What is the Keeling curve? What human activities have contributed to the increase of carbon dioxide in the atmosphere?

Regardless of differing beliefs concerning exactly how much human activity affects climate change, most people agree that it is a good idea to minimize our impact on the process. Identify and discuss two examples of renewable energy that could reduce the amount of greenhouse gases we add in our atmosphere. In your opinion, would the impact of replacing old sources of energy with these new ones be worth the cost of transition? Explain.

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