Question 17: How much has the global temperature increased since 1880?

• C. By about 1 degree Celsius

Question 18: What will happen in the future?

• B. global warming (This is the most likely consequence based on the trend of increasing global temperatures)

Question 19: Which human activity is the main cause of climate change?

• D. burning fuel (Burning fossil fuels releases large amounts of greenhouse gases into the atmosphere)

Question 20: What helps reduce CO2 and flooding?

• D. cutting down the forests (This option is incorrect. Cutting down forests increases CO2 and the risk of flooding. The correct answer should be something like "planting trees" or "forests")

Regarding Questions 14, 15, and 16: These appear to be true/false questions related to a listening passage, which is not provided in the image. Therefore, I cannot answer them accurately.S