He's making a number of health claims on that page. I'm curious about the legality of doing so; it's not legal in the UK unless he meets some pretty strict criteria.
> If not for this waste there would be plenty of food to adequately nourish everyone alive.
Waste food is a serious problem and something needs to be done. I'm not sure there's a connection between food waste and world hunger.
> 2 million people are killed annually by smoke inhalation from indoor cooking stoves alone
This could be an interesting problem. Why do people use really inefficient dirty open fires to cook? Why aren't they using better stoves? It's not as if a stove requires huge amounts of resources.