Bob Berwyn | Summit County Voice

Effectively reducing greenhouse gas emissions on a global level means tackling transportation, which accounts for more than 25 percent of all CO2 emissions in the U.S. bberwyn photo.
Effectively reducing greenhouse gas emissions on a global level means tackling transportation, which accounts for more than 25 percent of all CO2 emissions in the U.S. bberwyn photo.

Planners and elected officials may not be able to ignore the climate impacts of transportation for much longer. A California appeals court last week ruled against the San Diego Association of Governments in a lawsuit centered on a freeway oriented plan that fails to assess climate and public health risks of a transportation plan that invests heavily in freeways and subsidizes sprawl at the expense of public transit.

The transportation sector is the second biggest source of greenhouse gases (28 percent, just behind power generation (32 percent). he majority of greenhouse gas emissions from transportation are CO2 emissions resulting from the combustion of petroleum-based products, like gasoline, in internal combustion engines.

According to the EPA, the largest sources of transportation-related greenhouse gas emissions include passenger cars and light-duty trucks, including sport utility vehicles, pickup trucks, and minivans. These sources account for over half of the emissions from the sector. The remainder of greenhouse gas emissions comes from other modes of transportation, including freight trucks, commercial aircraft, ships, boats, and trains as well as pipelines and lubricants.

A coalition of conservation groups challenged the regional plan under the California Environmental Quality Act, joined by California Attorney General Kamala Harris. Read more