even ozone, to form a wide variety of toxic products, some of which may cause biological mutations. Examples of these chemicals include the nitrate radical, nitroarenes, and nitrosamines. Visibility Impairment - Nitrate particles and nitrogen dioxide can block the transmission
In the U.S., the clocks will be turned back one hour on Nov. 2, at 2:00 a.m. local time, so trick-or-treaters will hang on to a little more light on Halloween. (Mark your calendar, we âspring aheadâ an hour on the second Sunday in March.). If you live in Europe, you will have already moved your clock back to Standard Time on Sunday, Oct. 26, in the wee hours of the morning (it varies by country), in Asia, most countries do not observe Daylight Saving.
Last Updated Mar 6, 2015 6:40 PM EST. For many Americans, adjusting the clocks to spring forward an hour and gain a little extra sunlight is a welcome change after the long, dark winter. It's coming up soon: this year, daylight saving time begins at 2 a.m. on Sunday, March 8. But losing that hour of sleep can have surprisingly serious health consequences.