No. The amount of ozone above a location on the Earth varies naturally with latitude, season, and from day-to-day. Under normal circumstances, the ozone layer is thickest over the poles and thinnest around the equator. The ozone layer over Canada is normally thicker in winter and early spring; it can vary naturally by about 25 per cent between January and July. Weather conditions can also cause considerable daily variations. See similar questions...

Ozone (O3) is a molecule made up of three oxygen atoms. The oxygen we breathe (O2) is similar but has only two oxygen atoms. High up in a region of the upper atmosphere known as the stratosphere, light rays can break down breathable oxygen into two individual oxygen atoms. Single oxygen atoms are quite reactive, and ozone is formed when one of these lone oxygens bump into and combine with O2. But ozone isn't very stable either. See similar questions...

Humans have damaged the ozone layer by adding molecules containing chlorine or bromine that lead to ozone destruction. The largest group among these are chlorofluorocarbons (CFCs). At ground level, these molecules are stable and have many uses in industrial and domestic applications. However, when they are released into the atmosphere, they drift up to the stratosphere, pushed by winds and atmospheric mixing. See similar questions...

Through extensive research, scientists identified the human-produced chemicals that are responsible for the destruction of stratospheric ozone. As evidence emerged on the extent of the threat to the ozone layer, the international community agreed to control ozone-depleting substances and schedule a timetable for completely phasing them out. This agreement is known as the Montreal Protocol and is a monumental achievement in international cooperation and environmental protection. See similar questions...

Global warming and ozone depletion are two separate but related threats. Global warming and the greenhouse effect refer to the warming of the lower part of the atmosphere (also known as the troposphere) due to increasing concentrations of heat-trapping gases. By contrast, the ozone hole refers to the loss of ozone in the upper part of the atmosphere, called the stratosphere. See similar questions...

Ozone is very rare in our atmosphere, averaging about three molecules of ozone for every 10 million air molecules. In spite of this small amount, ozone plays vital roles in the atmosphere. This document provides answers to some of the questions that are most frequently asked about ozone and the changes that have been occurring in recent years. See similar questions...

No, the amount of CFCs released from all medications is minimal. Historically, asthma aerosol inhalers have released less than 1% of the estimated half a million tonnes of CFCs released by all industries in Australia since the inception of asthma aerosol inhalers in the 1960s. See similar questions...

Contrary to what a lot of people think, none! 'Good' and 'bad' ozone exist (like good and bad cholesterol) but neither plays any part in global warming. The 'good' ozone is to be found 15 km above our heads in the famous ozone layer. This layer is permanent and protects us from harmful ultra violet rays emanating from the sun. The hole in the ozone is produced by chlorofluorocarbons (CFC), chloride gases which up until 1987 were used in aerosol cans and refrigerating systems. See similar questions...

Yes, some do while others do not. Normally all refrigerants handled by reputed manufacturers and its service technicians will never be released to the atmosphere that could deplete the ozone layer. It is important to note that refrigerants alone are not responsible as many other chemicals cause global warming problems apart from Ozone depletion. Burning of fossil fuels causes problems on larger scale. See similar questions...

Funds are distributed to individuals based on their need; a family of four may need less funds than a family of six. The BLESS team in Egypt, led by H.G. Bishop Youannes, keeps comprehensive track of individuals who receive funds from BLESS USA. BLESS extensively investigates and verifies every case it receives for aid. A careful and thorough evaluation method is used to identify individuals in need and assess their situation: Assessment - H.G. See similar questions...

One of the key abilities of MDR is for a system administrator to control the resource usage of the SAP system. As an MDR program executes, the administrator is able to increase or decrease the number of parallel jobs that are used to run the report. Hence, at times of low on-line system usage, the number of jobs can be increased in order to make the job run faster. At times of peak on-line usage, the number of jobs can be decreased so on-line performance is not impacted. See similar questions...

Ozone's unique physical properties allow the ozone layer to act as our planet's sunscreen, providing an invisible filter to help protect all life forms from the sun's damaging ultraviolet (UV) rays. Most incoming UV radiation is absorbed by ozone and prevented from reaching the Earth's surface. Without the protective effect of ozone, life on Earth would not have evolved the way it has. See similar questions...

Global ozone levels declined an average of about 3 per cent between 1979 and 1991. This rate of decline is about three times faster than that recorded in the 1970's. In addition to Antarctica, ozone depletion now affects almost all of North America, Europe, Russia, Australia, New Zealand, and a sizable part of South America. Short term losses of ozone can be much greater than the long term average. In Canada, ozone depletion is usually greatest in the late winter and early spring. See similar questions...

The depletion of the ozone layer leads, on the average, to an increase in ground-level ultraviolet radiation, because ozone is an effective absorber of ultraviolet radiation. The Sun emits radiation over a wide range of energies, with about 2% in the form of high-energy, ultraviolet (UV) radiation. Some of this UV radiation (UV-B) is especially effective in causing damage to living beings, for example, sunburn, skin cancer, and eye damage to humans. See similar questions...

High up in the atmosphere, in a region called the stratosphere between 19 and 30 km above the Earth's surface, ozone is constantly being produced and destroyed naturally. This ozone layer filters out UV rays from the Sun and protects life on Earth. Usually there is a fine balance between the build up and loss of ozone. See similar questions...

Yes, significant depletion of the Arctic ozone layer now occurs in some years in the late winter/spring period (January-April). However, the maximum depletion is generally less severe than that observed in the Antarctic and is more variable from year to year. A large and recurrent “ozone hole,” as found in the Antarctic stratosphere, does not occur in the Arctic. See similar questions...