Section 2
Section 3
Section 4
32. Planting crops and transporting crops need oil.
33. Advantage: increased food availability
34. Proper temperature is also must
35. Disadvantage: losses of wildlife habitat
37. declined in disease
38. Great erosion was caused by floods
39. solar energy is unreliable
40. plant need certain humidity
Passage 2:
Passage 3:
Task 2
who this person is
how often he/she travels by air
where he/she usually travels to
and explain why he/she often travels by air.