Green Car Congress
SEPTEMBER 6, 2020
B) Temperature dependence of total gas-phase emissions from asphalt, ranging from in-use (40 °C to 60 °C) and storage (80 °C to 140 °C) to paving and overheating (120 °C to 200c°C) temperature conditions (filled circles). Asphalt’s life cycle and temperature-dependent emissions. (A)
Green Car Congress
OCTOBER 28, 2010
The two combine in the atmosphere to make either nitric acid or peroxynitrous acid; the so-called branching ratio of these two chemicals is important in models of ozone production. This means less of the hydroxyl radical and nitrogen dioxide go away, leading to proportionately more ozone, mostly in polluted areas, Okumura said.
Green Car Congress
AUGUST 9, 2012
In California’s Los Angeles Basin, levels of volatile organic compounds (VOCs) pollutants have decreased by about 98% since the 1960s, even as area residents now burn approximately three times as much gasoline and diesel fuel. CO2 ratio for this flight track segment decreased from 24.5 ppbv/ppmv to 10.7 Source: Warneke et al.
Green Car Congress
APRIL 19, 2013
The study also shows that the proportion of gaseous aromatic compounds—apart from benzene—in hydrocarbon emissions is two to three times greater in pollution plumes in Paris than in Los Angeles, even though the total quantity of hydrocarbons emitted in Los Angeles remains considerably greater than in Paris.
Green Car Congress
APRIL 11, 2019
Improving access to cleaner forms of transportation, like electrified public transport and active commuting by cycling and walking, would not only bring down NO 2 levels, but would also reduce asthma, enhance physical fitness, and cut greenhouse gas emissions. —Susan Anenberg.
Green Car Congress
AUGUST 16, 2016
The US Environmental Protection Agency (EPA) and the US Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) jointly released the finalized Phase 2 greenhouse gas and fuel efficiency standards for medium- and heavy-duty trucks.
Green Car Congress
SEPTEMBER 1, 2012
Still, scientists agree that black carbon in the atmosphere has a significant effect on global and regional climate, with earlier studies ranking the warming effects of black carbon particles second only to carbon dioxide gas. Cappa, a professor of engineering at the University of California, Davis, and Timothy B.
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