Why are teens more stressed today?

It seems that teens are more stressed today than I was as a teen or even my parents or grandparents. Why is that?

https://www.yahoo.com/health/from-stressed-to-dep…

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8Theresa GouldChicago, Illinois
    10/13/14
    We put so much pressure on teenagers...especially girls.
    1
      10/15/14
      8Theresa Gould
      It seems like they put a lot of pressure on themselves too.
      0
      About Theresa Gould
      Current: Chicago, Illinois
      Birth: August 10
      On Moms.com since: Aug 5, 2013
      ***Baby Team Leader Moms.com*** I have been married for over 20 years. My husband and I have eight children ages 18 down to 4 years old. We use to live in Chicago but now live in Canada. I own www.FaithandFamilyReviews.com.