Your kids may be eating sand in their pizza at school

[youtube https://www.youtube.com/watch?v=5MPfJEqQq0k&w=620&h=315]

From Mother Jones and their visit to a school lunch conference:

While the exhibitors were eager to show off their products' nutritional stats, few offered actual ingredients lists. When I asked the rep at the Uno pizza booth why ingredients weren't included on his nutrition information shee…