Green Car Congress

APRIL 4, 2011

Climate response to non-CO 2 vehicle emissions. Bars on the right show uncertainty ranges for 2070, including contributions from both forcing and climate sensitivity (67%; CI). Bars on the right show uncertainty ranges for 2070, including contributions from both forcing and climate sensitivity (67%; CI). Shindell et al.

Climate 231

Climate Standards Emissions Climate Change 231

Green Car Congress

OCTOBER 30, 2009

Despite their limitations, GWPs are widely used for comparison among long-lived gases, forming the basis for worldwide political agreements on climate and carbon trading. And hydroxyls drive long chains of reactions involving other common gases, including ozone. Shindell et al. Drew Shindell.

Climate Change 268

Climate Change Climate Ozone Pollution 268

Green Car Congress

APRIL 2, 2012

The US Environmental Protection Agency (EPA) has submitted its final Report to Congress on Black Carbon , in response to an October 2009 request from Congress to advance efforts to understand the role of black carbon (BC) in climate change. Effects of BC on climate, as compared to GHGs. Earlier post.). Earlier post.). Source: EPA.

Congress 252

Congress EPA Carbon Emissions 252

Green Car Congress

NOVEMBER 10, 2009

HFO-1234yf is a non-Ozone Depleting Substance with a Global Warming Potential (GWP) of 4. In comparison, the current refrigerant, R-134a, has a GWP of 1,430. The results from the CRP1234 programs that investigated the new refrigerant for use in mobile air conditioning systems (cars and light trucks) are available on-line.

Global 186

Global USA Climate Change Japan 186

Green Car Congress

AUGUST 28, 2009

Comparison of annual N 2 O ODP-weighted emissions from the 1990s with emissions of other ODS in 1987 and in 2008. Currently, anthropogenic N 2 O emissions represent the largest contribution to ozone depletion. Today, nitrous oxide emissions from human activities are more than twice as high as the next leading ozone-depleting gas.

Ozone 150

Ozone Emissions 2009 Climate 150

Green Car Congress

MAY 12, 2017

A new study quantifying emissions from a fleet of gasoline direct injection (GDI) engines and port fuel injection (PFI) engines finds that the measured decrease in CO 2 emissions from GDIs is much greater than the potential climate forcing associated with higher black carbon emissions from GDI engines. —Saliba et al.

Fleet 207

Fleet Engine Global Fuel Economy 207