XV: Choose the correct answers to complete the passage CARBON FOOTPRINTS Everybody has a carbon footprint - it's the(1)__________ _____ of carbon dioxide we produce with any action or activity.(2)__________________carbon dioxide contributes to 'greenhouse gases', our carbon footprints have a direct impact( 3)________________the environment. You can estimate your carbon footprint on any number of popular websites: if it's (4)____________, then you're probably leading a relatively green lifestyle. But(5)______________happens if it's big? Well, the answer is that you can(6)______________it. This modern answer to the problem is for people to contribute to balancing the negative effects of their actions by using (7)_________________ fuels, recycling, reforestation and a number of other activities which are said to contribute to a lowering of (8)_________________carbon dioxide. 1. a. Number b. quality c. amount d. period 2. a. As b. Although c. However d. Due to 3. a. For b. to c. on d. in 4. a. Small b. large c. free d. fine 5. a. When b. what c. why d. how 6. a. Replace b. reuse c. increase d. balance 7. a. Fossil b. leaded c. smoky d. green 8. a. Moving b. lowering c. rising d. falling