By Dr. Robert Guderian (auth.)
Emissions of gaseous air pollution have elevated within the final years despite elevated controls and problem for air caliber. Predictions of destiny improvement additionally point out extra elevate in emissions has to be anticipated. From an in depth research of gas use in traditional energy vegetation in and for family heating, Brocke and Schade (1971) and Schade (1975) expect that sulfur dioxide (S02) emissions within the Federal Republic of Germany increases from '3. five million t in 1969, over four. 2 million t in 1973, to four. 6 million t in 1980. Rasch (1971) predicts that emission of hydrogen chloride (HCI) from burning of wastes increases from a gift 8000 t/year to approximately one hundred thousand t in 1980. Emission of gaseous fluoride compounds, in North Rhine Westphalia on my own, are anticipated to extend from 7500 t in 1969 to 8800 t in 1985 (MAGS, 1972). related predic tions have additionally been made within the united states (Heggestadt and Heck, 1971). A doubling of S02 emissions from oil and especially coal-fired energy vegetation is predicted among 1960 and 1980 (Wood, 1968; Lewis et aI. , 1974). whilst it truly is thought of that overall keep an eye on of air pollution is technically and particularly economically very unlikely, it is crucial that, sooner or later, emissions are managed inside of a technical and monetary framework to such an volume that ambient pollutant concentrations close to the floor current no chance to guy or his setting (BImSchG, 1974).
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Additional info for Air Pollution: Phytotoxicity of Acidic Gases and Its Significance in Air Pollution Control
0 34 Experimental Analysis of the Effects of Gaseous Air Pollutants S conlenl in ", of dry moUer Degree of injur y 1o r-----------------------~~--------------------------__. ----------__+ ' 0 m t---------------:O'"'''5'''" 2 Q :0: 1-____---fI:r-s__ ~---~L--~~L-~~ ll i C. 20. - _ _ -<'>-Experlmenl 2 I I,. concentration l.... 50 'I. 75 ',. 21. Influence of the concentration of various glucose solutions on the sensitivity of field bean leaves to sulfur dioxide This connection between carbohydrate content of leaves and plant sensitivity is demonstrated with the following experiment on tomato (Lycopersicum esculentum, Sterlingcross Fl) exposed to HCI (Table 8).
Radiation is one of the most important of these factors as,when all other factors are held constant, stomatal reactions to light can be interpreted as photonasty (Mohr, 1969). Because the stomata of most plants are closed in darkness, it was generally thought that pollutant action during the night would have little or no effect (Lotfield, 1921; Zimmermann, 1950). Van Haut (1961) and Zahn (1963 b), however, were able to disprove this assumption in experiments with S02' Although action of pollutants during the night has a less severe effect than during daylight, both effects must be considered together, as exposure during the night can intensify the effects of daylight exposures.
I 22 I, .... ,' .. 3 90 lijJht on "- "-. ..... ,~ ""'-~,-'" '. l . ---. HQl - "-HWA ....... 0 "-",\\ ........... :'-\ ~\ .... 0 lijJht off Fig. 19. Daily variations in the size of the stomatal pores of lettuce grown under various light conditions (in units of measure = ME). , 1963). In further research, Dugger and Ting (1968) showed that PAN sensitivity is controlled by a light-mediated system in the 660 nm and 700 nm range and that plants were more sensitive under 660 nm than under 700 nm.