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ADAC testing finds new diesel cars cleaner than required; Euro 6c and 6d-Temp vehicles well below the permissible NOx limits

Green Car Congress

The tolerance values—conformity factors (CF)—had been set by the European Commission in order to take into account the technical and statistical inaccuracies of the RDE measurements. Thus, for Euro 6 diesel vehicles, a NO x limit of 80 mg / km was established for the test bench measurements.

Diesel 353
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DLR: cleaner aircraft emissions reduce the climate impact of contrail cirrus

Green Car Congress

Hatched areas indicate locations in which the difference is statistically significant at a 95% confidence level. and d contrail cirrus net radiative forcing due to a 80% reduced initial ice crystal number (low minus present-day initial ice crystal number). Burkhardt et al.

Climate 278
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UC Davis researcher finds ride-hailing EVs offer triple the emissions benefits of a personally owned EV

Green Car Congress

The study’s analysis showed those concerns are overstated, noting it found no statistical difference between the two technologies for ride-hailing companies. That said, California passed legislation in 2018 that compels transportation networking companies to become cleaner, and part of that involves electrification. —Alan Jenn.

Davis 239
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Number of Larger Displacement Vehicles Increasing in UK

Green Car Congress

million in 2008, data from the Office for National Statistics (ONS) showed. The two-liter car today is much cleaner, greener and safer than its decade-old predecessor. The number of licensed vehicles in the UK with engine capacity of more than 2,000cc increased from 2.3 million in 1999 to 4.0 Big is not always bad.

2008 199
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Electric cars cleaner than any gas-only car for 97 percent of U.S. drivers

Green Car Reports

But unless they're charged entirely on renewable energy—still statistically unlikely today—there are emissions associated with generating the electricity used to charge their batteries. Electric cars have no tailpipe emissions when running.

Cleaner 118
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Study finds some improved cookstoves may emit more black carbon pollution than traditional mud cookstoves

Green Car Congress

In this plot, a red star under the boxes means that the mean values for hardwood and mixed fuel tests are statistically different for that stove technology class (at the 95% confidence level, p. They did the test in real homes as part of Project Surya, which quantifies the impacts of cleaner cooking technologies in a village in India.

Pollution 231
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Study: consumer products overtake transportation as largest source of VOCs air pollution in cities

Green Car Congress

We consider four key pieces of evidence to support this finding: (i) energy and chemical production statistics; (ii) near-roadway measurements of transportation emissions, together with laboratory testing of chemical products; (iii) ambient air measurements away from roads; and (iv) indoor air measurements.

Pollution 264