Should Maryland farms and waste water facilities be able to trade credits to offset nitrogen or phosphorus pollution? Supporters say it’s innovative, but skeptics say it’s nothing more than paying to pollute. Today on Midday, Nutrient Trading, lead in the environment, the incinerator in Curtis Bay, and sensible redevelopment along Baltimore’s waterfront are just a few of the many topics we’ll cover in a conversation with the Maryland Secretary of the Environment, Ben Grumbles.