Last summer, smoke from Canadian wildfires caused several days of dangerously unhealthy air for Indiana.

Deaths and disease linked to air pollution have dropped across the United States over the past few decades, but not all communities are equally reaping the benefits.

Activists in southern Indiana are calling victory this week after the state threw a major hurdle at a proposed coal-to-diesel plant there.

Smoke from Canadian wildfires and pollution has triggered a statewide air quality action day in Indiana for Thursday.

Until the wildfires are under control, it might be best for Hoosiers to check the air quality before they go out and keep an N95 mask handy.

Experts say any air quality level above 100 is not good. So far this week, much of Indiana has seen levels exceeding 200.

Drifting smoke from the ongoing wildfires across Canada is creating curtains of haze and raising air quality concerns throughout the Great Lakes region, and in parts of the central and eastern United States.

This means children, seniors, and anyone with a heart or lung condition should avoid strenuous work or outside exercise.

The Indiana Department of Environmental Management is forecasting high ozone levels Tuesday for four regions in the central, southern and western parts of the state.

Smoke from wildfires in the western United States and southern Canada, along with local weather conditions, have created the potential for unhealthy levels of fine airborne particles in every region of the state.