full transcript

From the Ted Talk by TED-Ed: What's the best fuel for your car?

Unscramble the Blue Letters


One approach to carbon-neutral fuel is to carpute carbon dioxide from the atmosphere and combine its carbon with the hogyedrn in water. This creates hydrocarbons, the source of energy in fossil fuels— but without any emissions if the fuels are made using clean electricity. These fuels take up more space than an etelgncleiray eqaueinlvt amount of gasoline— an obstacle to using them in cars.

Another approach is to make carbon-neutral fules from plants, which sequester carbon from the air through photosynthesis. But growing the plants also has to be cbaron neutral— which rules out many crops that require fertilizer, a big contributor to greenhouse gas emissions. So the next generation of these fuels must be made from either plant wtase or plants that don't require frzeetliir to grow. Biofuels can be about as efficient as gasoline, though not all are.

Open Cloze


One approach to carbon-neutral fuel is to _______ carbon dioxide from the atmosphere and combine its carbon with the ________ in water. This creates hydrocarbons, the source of energy in fossil fuels— but without any emissions if the fuels are made using clean electricity. These fuels take up more space than an _____________ __________ amount of gasoline— an obstacle to using them in cars.

Another approach is to make carbon-neutral _____ from plants, which sequester carbon from the air through photosynthesis. But growing the plants also has to be ______ neutral— which rules out many crops that require fertilizer, a big contributor to greenhouse gas emissions. So the next generation of these fuels must be made from either plant _____ or plants that don't require __________ to grow. Biofuels can be about as efficient as gasoline, though not all are.

Solution


  1. hydrogen
  2. capture
  3. waste
  4. fertilizer
  5. equivalent
  6. fuels
  7. carbon
  8. energetically

Original Text


One approach to carbon-neutral fuel is to capture carbon dioxide from the atmosphere and combine its carbon with the hydrogen in water. This creates hydrocarbons, the source of energy in fossil fuels— but without any emissions if the fuels are made using clean electricity. These fuels take up more space than an energetically equivalent amount of gasoline— an obstacle to using them in cars.

Another approach is to make carbon-neutral fuels from plants, which sequester carbon from the air through photosynthesis. But growing the plants also has to be carbon neutral— which rules out many crops that require fertilizer, a big contributor to greenhouse gas emissions. So the next generation of these fuels must be made from either plant waste or plants that don't require fertilizer to grow. Biofuels can be about as efficient as gasoline, though not all are.

Frequently Occurring Word Combinations


ngrams of length 2

collocation frequency
liquid fuels 3
greenhouse gas 3
carbon dioxide 3
burning fossil 2
fossil fuels 2
electric cars 2
gas emissions 2
cost difference 2

ngrams of length 3

collocation frequency
burning fossil fuels 2
greenhouse gas emissions 2

Important Words


  1. air
  2. amount
  3. approach
  4. atmosphere
  5. big
  6. biofuels
  7. capture
  8. carbon
  9. cars
  10. clean
  11. combine
  12. contributor
  13. creates
  14. crops
  15. dioxide
  16. efficient
  17. electricity
  18. emissions
  19. energetically
  20. energy
  21. equivalent
  22. fertilizer
  23. fossil
  24. fuel
  25. fuels
  26. gas
  27. gasoline
  28. generation
  29. greenhouse
  30. grow
  31. growing
  32. hydrocarbons
  33. hydrogen
  34. obstacle
  35. photosynthesis
  36. plant
  37. plants
  38. require
  39. rules
  40. sequester
  41. source
  42. space
  43. waste
  44. water