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Reaching the Age of Adolescence

Unit 1
Puberty
What is Puberty?Physical ChangesEmotional ChangesSocial Changes
Unit 1 • Chapter 4

Social Changes

Video Summary

The summary is about a study that found that people who are exposed to more air pollution have a higher risk of developing dementia. The study was conducted by researchers at the University of California, Berkeley, and published in the journal Neurology. The researchers found that people who lived in areas with high levels of air pollution had a 10% higher risk of developing dementia than people who lived in areas with low levels of air pollution. The risk was even higher for people who were exposed to air pollution for longer periods of time. The researchers believe that air pollution may damage the brain by causing inflammation and oxidative stress. These are two processes that are known to contribute to the development of dementia. The study's findings suggest that air pollution is a major public health problem that could lead to an increase in the number of people who develop dementia. The researchers call for more research to be done on the link between air pollution and dementia in order to develop ways to reduce the risk of this devastating disease.

Knowledge Check

Which of the following is not a major social change that occurred in the 20th Century: the Industrial Revolution, the Digital Revolution, the French Revolution, the Enlightenment?

Which of the following is not a negative consequence of the Digital Revolution: unemployment, the wealth gap increasing, a decrease in literacy, pollution?

Which of the following is not a major factor in the increase in obesity in the 20th Century: the increased availability of cheap, unhealthy food, the decrease in physical activity due to technology, the invention of the automobile, the increase in population?