Vocabulary. migration, resistance, integrated.

　　The World Future Society has published a special report about forces changing the world.

　　One of them is population growth.

　　The report says the world is expected to have more than 9,000 million people by the middle of this century.

　　Population growth in many industrial nations, however, is expected to drop.

　　But medical progress helps their people to live longer lives.

　　International migration is also shaping the future.

　　The report says there is some resistance but also growing acceptance of cultural differences.

　　The world economy is also becoming more integrated.

　　On the issue of energy, the use of oil is expected to reach 110 million barrels a day by 2020.