Various factors can modify the health effects of outdoor air pollution. Prior findings about modifiers are inconsistent, and most of these studies were conducted in developed countries. The researchers conducted a time-series analysis to examine the modifying effect of season, sex, age, and education on the association between outdoor air pollutants [particulate matter

Over the past several decades, satellite surveillance with increasingly sophisticated instruments has enabled scientists to better visualize the complex fluctuations of several pollutants as they make their way around the Earth. One aspect of this research has focused on directly correlating satellite-observed concentrations of pollutants in the atmosphere with those at ground level.

This study examines the annual, seasonal and diurnal variations in the ambient concentrations of ozone at a suburban site of Varanasi, India, during 2002-2006. Prominent seasonal variations in ozone concentrations were recorded. Ozone concentrations were higher during the warmer months.

After a decade of deliberations and review of more than 1,700 new studies, the U.S. Environmental Protection Agency (EPA) announced the new primary standard for ground-level ozone in March 2008. The new standard, 75 ppb, is being assailed from all sides

It is now common knowledge that the Montreal Protocol in its effort to phase out the use of ozone depleting substances, especially CFCs, also alleviated the growing climate problem significantly. Some say the world was given a grace period of 10 years in which to react to the potentially cataclysmic effects of climate change. This publication attempts to provide information and guidance to decision makers in developing countries, both in government and the private sector.

The Montreal Protocol with its subsequent amendments and adjustments has been providing a global regulatory framework for the phase out of ozone depleting substances. Till date, CFCs, CTC, HBFCs, methyl chloroform and halons have been already phased out completely by the developed countries and a number of other ODSs are scheduled to follow.

Given the intensity of agriculture and the position of environmental degradation in the country it is necessary to strike balance between fertilizer use and developmental goals for the achievement of economic and environment sustainability. The development could be possible only through judicious management of natural resources without losing much on the pace of the present development.

Increasing tropospheric ozone levels over the past 150 years have led to a significant climate perturbation; the prediction of future trends in tropospheric ozone will require a full understanding of both its precursor emissions and its destruction processes. A large proportion of tropospheric ozone loss occurs in the tropical marine boundary layer and is thought to be driven primarily by high ozone photolysis rates in the presence of high concentrations of water vapour.

Halogens are known to decrease the levels of stratospheric ozone. The latest measurements show that something similar occurs in the lower atmosphere over tropical oceans

Ozone is one of the highly reactive gases, which is photo chemically active. It is composed of three atoms of oxygen (O3) and its role depends on its location in the atmosphere. This gas plays a different role in the lowest two layers of the atmosphere, known as the stratosphere and troposphere. In the stratosphere, above the tropopause about 90 percent of the ozone protects life on earth from the sun's dangerous ultraviolet radiation.

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