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.
On the second Sunday in March daylight saving time begins and the clocks spring forward one hour. This happens at 2 a.m., so you should change your clocks by moving the time one hour ahead before going to bed on Saturday evening for any devices that don't update the time automatically. Below are the next several dates for moving the clocks in the spring. Sunday March 11, 2018; Sunday March 10, 2019; Sunday March 8, 2020; Sunday March 14, 2021