Green Car Congress
JANUARY 28, 2019
Impact of a reduction in initial ice crystal number, as may be caused by reduced soot emissions, on global contrail cirrus properties. Hatched areas indicate locations in which the difference is statistically significant at a 95% confidence level. hPa and absolute change in c total cover of contrail cirrus with an optical depth?
Green Car Congress
JULY 9, 2020
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.
Green Car Congress
FEBRUARY 22, 2019
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.
Green Car Congress
JULY 12, 2018
The California Air Resources Board (CARB) announced that greenhouse gas emissions in California in 2016 fell below 1990 levels for the first time since emissions peaked in 2004—a reduction roughly equivalent to taking 12 million cars off the road or saving 6 billion gallons of gasoline a year.
Green Car Reports
JUNE 5, 2017
Electric cars have no tailpipe emissions when running. 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.
Green Car Congress
FEBRUARY 16, 2018
Consumer products such as shampoo, cleaning products and paint now contribute as much to emitted volatile organic compounds (VOCs) in cities as tailpipe emissions from vehicles, according to a new study led by NOAA. Total VOC emission factors for end uses of petrochemical sources in the study. —McDonald et al.
Green Car Congress
NOVEMBER 17, 2009
Despite the economic effects of the global financial crisis (GFC), carbon dioxide emissions from human activities rose 2% in 2008 to an all-time high of 1.3 Other main findings of the study include: CO 2 emissions from the burning of fossil fuels have increased at an average annual rate of 3.4% over the previous seven years.
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