If your buying a diesel to roll coal you need to spend your money elsewhere! what happens when you put a bag over the intake is you starve the turbo of air. therefor you fool your engine and it will keep feeding fuel. All that coal you speak of is unused fuel fyi. You will not maitain any fuel economy in doing so.
New Hampshire is a Dillon Rule state, meaning that the state retains all powers not specifically granted to municipalities. Even so, the legislature strongly favors local control, particularly with regard to land use regulations. New Hampshire municipalities are classified as towns or cities
New Hampshire's most popular nickname, The Granite State, refers to the extensive granite quarries in the state. Granite is the official state rock of New Hampshire. This nickname refers to the New England rivers that originate in the White Mountains of the state. Major interstate rivers include the Connecticut River, the Pemigewasset River, the Merrimack River, the Androscoggin River, and the Saco River.