| But exercising on smoggy days can be unhealthy, even dangerous, for people who have asthma. |
| Researchers keep the concentration consistent and they can simulate everything from a clear day in Toronto to a smoggy day in Los Angeles. |
| Although the air around us may at times seem clean, with no visible brown smoggy haze or unpleasant smell, appearances can be deceiving. |
| In Long Beach Lot, the traffic missing from Blue Highway slumbers in the smoggy sunset, guarded by a ring of shadeless palms. |
| You may notice your breathing gets worse after a few minutes outside on smoggy days. |
| Should my child who suffers from asthma take extra precautions on smoggy days? |
