If only meat weren't so delicious! Sure, meat may pave the way to a heart attack. Yes, factory farms torture animals. Indeed, producing a single hamburger patty requires more water than two weeks of showers. But for those of us who are weak-willed, there's nothing like a juicy burger.

The ice bucket challenge went viral in 2014, partly because it was so much fun to watch videos of celebrities or friends dumping ice water on their heads. Videos of people in the challenge have been watched more than 10 billion times on Facebook - more than once per person on the planet.

My take is that the optimal approach to food, for health and ethical reasons, may be vegetarianism.

Nicholas Kristof Quotes