Regulators are holding a series of open houses around Minnesota to give people the chance to review and comment on a proposed statewide strategy for reducing phosphorus and nitrogen escaping into surface and groundwater.
Nitrogen is a crucial part of all living things. But the millions of tons of nitrogen manufactured by humans every year are a two-edged sword.
With skyrocketing gas prices, some say carpooling and biking may not be the only ways to lessen the pain of paying at the pump. They recommend nitrogen in tires.