human populations in the current major changes both in the number of the elements and the spread of the population by age groups.The activities in the living of life, career development, and the result of the human impact on the environment, in accordance with, for example, use of natural resources than necessary cause environmental problems such as water pollution.The sound pollution problems rubbish crisis and environmental risks such as greenhouse gas emissions in ozone layer atmosphere conditions are destroyed, so the study of the changes and the increase of the population distribution of the population.in both domestic and foreign countries, it is going to happen to the aware to the management in the prevention of problems
การแปล กรุณารอสักครู่..