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 14% higher risk of developing dementia than people who lived in areas with low levels of air pollution. The study also found that the risk of dementia was higher for people who were exposed to air pollution for longer periods of time.
What is the difference between a reference data type and a primitive data type?
What is the data type of the variable `a` in the following code? `var a = 'hello world'`
Which of the following is not a reference data type in JavaScript?
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