Air pollution advisory still in effect (Minneapolis-St. Paul Star Tribune) Air pollution health advisories are still in effect for the Twin Cities, Rochester and Marshall, Minn., through this morning, because of the buildup of fine airborne particles. People are being encouraged to reduce driving and idling, postpone fires and using snowblowers, and cut back on electricity use. High pressure over the Great Lakes, mixed with an approaching low pressure system, will ... [News Source]