Word: carbons
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Dates: during 1970-1979
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...begin to deviate from that ever increasing line along about the early 1960's, reach a maximum in the mdi-1960's and as of today the total hydro-carbon emissions are on the decline and they're going to continue to become less and less as time goes along and will reach a minimum around...
About that time the passenger car will begin to catch up with the level of control and the line of hydro-carbon emission will gradually begin to rise again...
...next slide (slide =5) shows what the very similar pattern for carbon monoxide...
...will decrease hydro-carbons by about 50 per cent, it will decrease oxides of nitrogen about 30 per cent on average and carbon monoxide some 35 per cent. This in itself will again hasten the decline of pollution in the atmosphere...
This system gives hydro-carbon levels that would meet 1975 kinds of problems. It would give carbon monoxide levels meeting the 1975 requirements. It won't do the job on oxides of nitrogen...