Look! There are planes in the airport.

    When you read this sentence, the population of the earth has grown by 10 people.  Most of these new people are born in developing countries.

    In the developed countries of Europe and North America, the population is growing very slowly. This is because women in these countries have，on average (平均) , only one or two children.  In the developing countries, more than one billion people already live below the poverty line (贫困线) .  Children get little or no time at school and suffer from many kinds of diseases.

    The UN has said that the world's population will reach 12.5 billion people by the year 2100. If the number makes your head spinning (眩晕) you're not alone. Many experts are worrying that so fast population growth could have very bad results.

Don't forget to the light before going out.

Please your English pronunciation.

Your best friend .