full transcript

## Unscramble the Blue Letters

Unfortunately, neither of the giant batteries we’ve talked about so far can slove this problem. The two lakes setup requires specific geography, takes up a lot of land, and has high upfront costs to build. The giant lithium-ion battery in ciaonrfila, meanwhile, can power about 250,000 homes, yes, but only for an hour. Lithium-ion batteries are gaert for things that don’t use a lot of power. But to store a lot of energy, they have to be huge and heavy. That’s why etrcielc planes aren’t a thing: the best electric pnlae can only carry two people for about 1,000 kilometers on one charge, or its batteries would be too heavy to fly. A typical commercial jet can crary 300 people over 14,000 km before refueling. Lithium-ion brtiatees also require certain heavy matels to make. These resources are limited, and mining them often causes environmental dmagae.

## Open Cloze

Unfortunately, neither of the giant batteries we’ve talked about so far can _____ this problem. The two lakes setup requires specific geography, takes up a lot of land, and has high upfront costs to build. The giant lithium-ion battery in __________, meanwhile, can power about 250,000 homes, yes, but only for an hour. Lithium-ion batteries are _____ for things that don’t use a lot of power. But to store a lot of energy, they have to be huge and heavy. That’s why ________ planes aren’t a thing: the best electric _____ can only carry two people for about 1,000 kilometers on one charge, or its batteries would be too heavy to fly. A typical commercial jet can _____ 300 people over 14,000 km before refueling. Lithium-ion _________ also require certain heavy ______ to make. These resources are limited, and mining them often causes environmental ______.

1. metals
2. damage
3. carry
4. batteries
5. california
6. solve
7. great
8. plane
9. electric

## Original Text

Unfortunately, neither of the giant batteries we’ve talked about so far can solve this problem. The two lakes setup requires specific geography, takes up a lot of land, and has high upfront costs to build. The giant lithium-ion battery in California, meanwhile, can power about 250,000 homes, yes, but only for an hour. Lithium-ion batteries are great for things that don’t use a lot of power. But to store a lot of energy, they have to be huge and heavy. That’s why electric planes aren’t a thing: the best electric plane can only carry two people for about 1,000 kilometers on one charge, or its batteries would be too heavy to fly. A typical commercial jet can carry 300 people over 14,000 km before refueling. Lithium-ion batteries also require certain heavy metals to make. These resources are limited, and mining them often causes environmental damage.

## Frequently Occurring Word Combinations

### ngrams of length 2

collocation frequency
high demand 2
giant batteries 2
heavy metals 2

## Important Words

1. batteries
2. battery
3. build
4. california
5. carry
6. charge
7. commercial
8. costs
9. damage
10. electric
11. energy
12. environmental
13. fly
14. geography
15. giant
16. great
17. heavy
18. high
19. homes
20. hour
21. huge
22. jet
23. kilometers
24. km
25. lakes
26. land
27. limited
28. lot
29. metals
30. mining
31. people
32. plane
33. planes
34. power
35. problem
36. refueling
37. require
38. requires
39. resources
40. setup
41. solve
42. specific
43. store
44. takes
45. talked
46. typical
47. upfront