Answer:The main idea of the passage is that climate change is a major global challenge caused by human activities and has severe consequences. Supporting Details and Key WordsSupporting DetailsClimate change is caused primarily by human activities, such as burning fossil fuels, deforestation, and industrial processes. These activities release greenhouse gases that trap heat, leading to global warming. The effects of climate change include stronger typhoons, rising sea levels, and extreme heat waves. Key WordsClimate change: The core topic of the passage.Greenhouse gases: The primary agents causing global warming. Fossil fuels: A key human activity contributing to climate change.