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.
Many countries change their clock twice a year to observe day light saving time. The date of Daylight Savings Time Starts and Ends may vary with year to year and also depends on location. In United States DST starts on the second Sunday of March at 02:00 AM.