“... system(s) aimed at being free of air and water pollution, CO₂, and other greenhouse gases...”
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“... Gabriel in which there have been majorchanges. This can be attributed to the presence of air pollution...”
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“... un transporte ecológico también se mejora la calidad del aire ya que a la circular no emiten el CO2...”
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“... avenues congested and high burden of air pollution and soil, which is related to the increased pedestrian...”
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“..., the pollutant emission regulations of the reciprocating internal combustion engines have significantly reduced...”
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“... on other pollutant emissions during engine warm up at the emissions cycle. Considering the new challenges...”
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“... tóxicas en los diferentes medios, ya sea aire, agua o suelos. Esto ha impulsado las investigaciones...”
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“...One of the main aspects in the development of modern diesel engines has been the direct injection...”
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