1. There is accumulating evidence t

1. There is accumulating evidence that air pollution is producing harmful effects in man. Many studies reveal that air pollution may cause reduced visibility, eye irritation, and respiratory irritation. Some medical studies link air pollution with lung cancer, emphysema and other diseases.

2. The severity of symptoms of illness increases proportionately with concentration of pollutants in the air. The first effects of air pollutants are likely to lead to discomfort. Though not associated with the development of disease, even in sensitive groups, these effects are capable of disturbing the comfort of the population in residential or industrial areas. This level is the one at which eye irritation occurs. Also in this category are levels of pollutants that damage vegetation and reduce visibility. A more serious level of pollutants, or possibly combination of pollutants, is likely to lead to insidious or chronic diseases or to significant alteration of important physiological function in a «sensitive group» such as the aged or sufferers from chronic respiratory or heart disease.

Pollution would not necessarily be a risk for persons in good health. But under conditons of intense pollution, this «sensitive group» may die.

3. Three episodes of acute air pollution have been characterized by sudden death. These tragedies occurred in Belgium's Meuse Valley in 1930, in Donora, Pennsylvania, in 1947, and in London in 1952. In each case a heavy fog settled over the area and did not lift; in each case the phenomenon was produced by a temperature inversion or a layer of warm air over a layer of cold air, and in each case there was a heavy concentration of smoke and pollutants.

4. During these periods, 63 deaths in Meuse Valley, 20 deaths in Donora, and 3,000 deaths in London were attributed to air pollution. Most of those who died were elderly people already suffering from diseases of the respiratory or circulatory systems. This disaster in London was a major factor in hastening the Clean Air Act of 1956. The emission of dark smoke from industrial chimneys was prohibited for the whole country.

5. Three general types of substances are known to pollute the atmospheres of all industrial environments: chemical, radioactive and biological. Chemical pollutants are the major concern because of expanding industrial, automobile and domestic wastes. However, radioactive pollutants add to the total radiation exposure in both urban and rural air. Biological dusts and pollens likewise may cause effects, especially in persons who react to them with hay fever, asthma, and other allergies.

Результаты (латинский) 1:

1. Quod aer pollutio silva constabat defectum in homine operatur. Multi studiis ostendere quod potest causare aer pollutio reducta uisibiliter, irritatio oculorum et tractus respiratorii irritatio. Cum pulmone aer pollutio quaedam medicinae studiis nectunt cancer et aliis morbis EMPHYSEMA. II. Et severitatem symptoms infirmitate tanto crescit in atmosphaera cum concentratione scelerisque. Primus effectus sint caeli scelerisque inducere molestiae. Si non una cum incremento morbus est , sicut in sensitiva coetus, effectus capax solatium turbantes multitudinem in residentialibus aut commercial elit. Hoc planum est quod oculus est irritatio. Et in scelerisque gradus sunt huius generis, quod paulatim reducere herbas et visibilis. De gravioribus: gradu scelerisque, sive compositum scelerisque, solet plumbeae quoscunque vel longis vel significantes Alteratio a magna physiologica munus in «sensitiva coetus» tam in senibus vel detrimento inveterata respiratorii aut cor morbus. Pollutio periculum non necessario personis valere. Sed mire Conditons pollutio, quod «coetus sensitivo», ut moriatur. III. Acuti fuerint tres episodes aer pollutio quaedam subita morte. Tragoediae istae non in Belgica Mosam vallis fuit in MCMXXX in Donora Pennsylvania in MCMXLVII et Londini 1952. In quolibet casu gravi nebula vestro non tangitis sarcinas et habitavit in regione; utrobique phaenomenon per frigidioris aeris temperies inversionem aut iacuit super iacuit frigidus aer, et de fumo, et utrumque est intentio scelerisque magna. IV. Per haec tempora, in Mosam valle LXIII mortem, XX Donora mortes et 3.000 mortes attribuitur ad caeli pollutio in Londini. Plerique eorum, qui senes populi sunt , iam morbi respiratorii systematis vel circulatoria. Maximi momenti in ea clades Londinum properantes in tenebris Tersus aer fumo emisso 1956. industriae actum prohibitum est universa terra scabillum. V. Substantiis commune tribus intelliguntur omnia polluere atmosphaerae industriae ambitus: substantialia, et biologicum ardens. Donec scelerisque maior curae sunt, quia de industria crescentem, automobile et domestica erigent. Autem, ad numerum addere radioactive scelerisque radialis nuditate, et in urbana et rustica aeris. Acta et pulveres causa effectus ut etiam pollens , qui maxime agere cum eis fenum febris, asthma et aliis allergies.