He clearly hasn't been to a UK supermarket recently, where everything remotely green is festooned with five a day advice. Further down of course, is the real heart of this article; the bitter truth that also bedevils the five a day campaign. What is it?
If you want to be healthier, you should eat more green vegetables.
He uses the slightly less loaded term 'leaves'; appropriately for salad obsessed America. But honestly, broccoli, cabbage, green beans and asparagus are all just fine too. Even peas as long as you eat them in moderation.