Pressures on natural resources will ...... as we face a population explosion

41. Pressures on natural resources will _____________ as we face a population explosion.
42. The world's population is _____________ to be over 7 billion by 2010.
43. Some scientists say that there are enough resources to _____________ 8 billion people.
44. The island now has (a)n _____________ airport.
45. People are not aware _____________ the problem of overpopulation.