Just in the past couple of years, there's been pushback against some of that marketing, as parents have gotten really upset. Now we're seeing Coke and Pepsi kind of shape-shifting. Instead of doing these very explicit marketing deals, they are getting into schools in much more hidden ways - things like My Coke Rewards, where they encourage schools to push their student body to purchase Coke products, in exchange for points that go toward various products for the school. It's a way for these companies to get in front of kids, presented as a form of charity.

The food industry is spending almost $2 billion a year marketing directly to children and teens. We know that those ads lead to children demanding certain brands, and we know that food and drink marketing gets all of us to consume more calories. If we're going to address diet-related illnesses, talking about marketing to kids is a key step. There should be places like schools that are protected sanctuaries from commercialization and from advertising, especially when it comes to kids' health.

Part of what the food industry does with public relations, just like the chemical industry or the oil industry, is to try to erase their fingerprints from their messaging. So when consumers hear about a recent effort like the "food dialogues" put on by a group called the US Farmers and Ranchers Alliance, do they know necessarily that these "dialogues" are being funded by companies like Monsanto, a large chemical company and the controller of most of the patents on genetically modified seeds? No, they don't.

People don't realize how much the food industry has infiltrated all aspects of our children's lived experience, including their experience at school. There are sponsored curricula by food companies, they're also in our schools with logos sponsoring sports teams.

Those of us who think about what we eat, how it's grown, those of us who care about the environmental impact of food - we've been educated by fabulous books, like Fast Food Nation and documentaries like Food Inc. But despite these and other great projects that shine a critical light on the topic, every year the food industry spends literally tens of millions of dollars to shape the public conversation about our food system.

Even very progressive, informed people still get tongue-tied responding to the question, can organic and sustainably raised food still feed the world? A corollary to that question, and one we certainly hear a lot these days, is that genetically modified foods are better for the environment because they use fewer chemicals, which has been thoroughly debunked.

Diet-related illnesses are causing nearly as many deaths as tobacco-related illnesses, not to mention the impact on quality of life when you start to develop adult-onset diabetes as a child, or all these other diet-related illnesses.