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.
As the days grow colder and shorter, it's also time for the annual confusion on when to change our clocks, if we're in a state that observes daylight saving time: When do we do that? Is it forward or back? Daylight saving time ends this year on Sunday, Nov. 6. Officially speaking, clocks should be turned back at 2 a.m., but many people do that before they go to bed Saturday night -- or get up in the morning and find they're an hour early for everything. Spring -- forward. Fall -- back. When in doubt, check your cell phone, which should change automatically. Here are some common questions about daylight saving time and its origins. What is daylight saving time? It's a period of time during the year in which clocks are moved one hour forward. When ...