Some of the major causes of air pollution include burning of fossil fuels, agricultural activities, exhaust from industries, vehicle fumes, mining operations and indoor pollutants. Air pollution has a negative impact on the environment and life in general.
Eastern Standard Time - is abbreviated as EST. Eastern Daylight Time- is abbreviated as EDT. Richmond, Virginia is GMT/UTC - 5h during Standard Time. Richmond, Virginia is GMT/UTC - 4h during Daylight Saving Time.
From west to east they are UTC - 5, UTC - 4, UTC - 4:30, UTC - 3 and UTC - 2. Countries in South America which use the UTC - 5 time zone are part of Brazil, Colombia, Ecuador and Peru. UTC - 4:30 is the standard time in Venezuela.