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by uj8efdkjfdshf
2337 days ago
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It's interesting to note that the 65g was removed from the air over 9000 miles, which averages to particulate matter being produced at a rate of about 0.0045g/km. However, the parent article suggests that the buses have engines that conform to the Euro 6 standard, which according to Wikipedia[0] allows for up to 0.01g/kWh of particulate emission for heavy duty diesel engines in trucks and buses (0.0045g/km for all other categories). Given that [1] suggests energy consumption levels of around 2-5 kWh/km depending on powertrain type, it looks like the bus produces upwards of 5-10x the amount of pollution it actually cleans up. So overall it looks like it would be more appropriate to market these buses as having a lower contribution to particulate matter pollution rather than actually cleaning up the air. Here's hoping that these buses actually transport people... [0] https://en.wikipedia.org/wiki/European_emission_standards [1] http://tf.llu.lv/conference/proceedings2015/Papers/060_Graur... |
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