• 

  Now Playing
  Farm linked to romaine, e.coli outbreak is recalling cauliflower and more lettuce

  00:34
• 

  Now Playing
  7 health myths debunked in 2018

  01:22
• 

  Now Playing
  Farm linked to romaine, e.coli outbreak is recalling cauliflower and more lettuce

  01:09
• 

  Now Playing
  Why is Denmark considered one of the happiest countries?

  01:56
• 

  Now Playing
  Best winter hacks to live through the harsh elements of the season

  01:08
• 

  Now Playing
  Scientists busted this famous health myths in 2018

  01:01
• 

  Now Playing
  China's environmental dilemma: fix its climate or the economy?

  01:10
• 

  Now Playing
  3 reasons skipping the flu shot makes no sense

  02:30
• 

  Now Playing
  Are dairy products actually healthy?

  01:13
• 

  Now Playing
  Which holidays foods are healthiest to eat?

  01:32
• 

  Now Playing
  3 easy fixes to lighten up your eggnog recipe

  01:16
• 

  Now Playing
  Plastic found in human bodies from 4 separate continents

  00:45
• 

  Now Playing
  Hundreds of Santas dash through the streets

  00:47
• 

  Now Playing
  Oil spills into Baltimores Inner Harbor

  00:35
• 

  Now Playing
  Study: Early to bed, early to rise is correct about one thing

  00:42