School bus emissions study to be released
June 25, 2007A U.S. government study suggested anti-idling advocates are on the right track in an ongoing debate concerning school bus exhaust emissions.
Many regulatory agencies and school districts limit the idling of school buses while students enter or leave the vehicles, thereby restricting children's exposure to airborne diesel pollutants.
But concerns remained whether stopping and then restarting school bus engines might result in higher emissions of diesel pollutants than occur during continuous idling.
In the new study by John Kinsey and colleagues at the U. S. Environmental Protection Agency, diesel emissions from a limited number of school buses under both scenarios were measured. The researchers concluded restarting buses results in fewer emissions, so long as the vehicles depart quickly without any extended period of idling.
The study is to be published in the July 15 issue of the journal Environmental Science & Technology.
Copyright 2007 by United Press International
-
Cut back on soot, methane to slow warming: study
Jan 12, 2012 |
2.9 / 5 (7) |
6
-
Removing sulfur from jet fuel cools climate: study
Dec 14, 2011 |
4 / 5 (8) |
3
-
Future Aussie trucking: silent and green
Nov 10, 2011 |
5 / 5 (1) |
1
-
Breathless in the Megacity
Sep 23, 2011 |
4 / 5 (1) |
1
-
First global portrait of greenhouse gases emerges from pole-to-pole flights
Sep 07, 2011 |
5 / 5 (9) |
5
-
Engineers build first sub-10-nm carbon nanotube transistor
Feb 01, 2012 |
4.9 / 5 (33) |
30
-
Something old, something new: Evolution and the structural divergence of duplicate genes
Jan 31, 2012 |
4.6 / 5 (7) |
1
-
The hidden nanoworld of ice crystals: Revealing the dynamic behavior of quasi-liquid layers
Jan 30, 2012 |
5 / 5 (4) |
1
-
Stock market network reveals investor clustering
Jan 27, 2012 |
3.9 / 5 (23) |
8
-
Of microchemistry and molecules: Electronic microfluidic device synthesizes biocompatible probes
Jan 26, 2012 |
5 / 5 (2) |
0
-
Do some geologists actually act a lot like Randy Marsh?
Feb 11, 2012
-
Discrepancy between oxygen and carbon-dioxide levels
Feb 09, 2012
-
where gems are found in the world
Feb 09, 2012
-
Wind Waves in Reservoir ~ Wind run-up and Wind set-up
Feb 08, 2012
-
Balance of oxygen in the atmosphere
Feb 01, 2012
-
The case for a methanol-based economy
Jan 30, 2012
- More from Physics Forums - Earth
More news stories
Latin America mining boom clashes with conservation
Latin America is experiencing a mining boom as prices rise fuelled by a hike in global demand, but the region is also being hit by a wave of violent protests, strikes and rallies by environmentalists.
21 hours ago |
5 / 5 (1) |
1
Salvage workers begin pumping fuel from Italian shipwreck
Salvage workers Sunday began pumping fuel from the shipwrecked Italian cruise liner Costa Concordia, a day ahead of schedule, officials said.
13 hours ago |
5 / 5 (2) |
0
Political leaders play key role in how worried Americans are by climate change: study
More than extreme weather events and the work of scientists, it is national political leaders who influence how much Americans worry about the threat of climate change, new research finds.
Feb 06, 2012 |
5 / 5 (8) |
75
NASA budget will axe Mars deal with Europe: scientists
US President Barack Obama's budget proposal to be submitted next week for 2013 will cut NASA's budget by 20 percent and eliminate a major partnership with Europe on Mars exploration, scientists said Thursday.
Space & Earth / Space Exploration
Feb 10, 2012 |
5 / 5 (4) |
58
Humans may have helped the decline of African rainforests 3000 years ago
(PhysOrg.com) -- Large areas of rainforests in Central Africa mysteriously disappeared over three thousand years ago, to be replaced by savannas. The prevailing theory has been that the cause was a change ...
Feb 10, 2012 |
4.1 / 5 (14) |
21
|
Scientists discover molecular secrets of 2,000-year-old Chinese herbal remedy
For roughly two thousand years, Chinese herbalists have treated Malaria using a root extract, commonly known as Chang Shan, from a type of hydrangea that grows in Tibet and Nepal. More recent studies suggest that halofuginone, ...
New method to examine batteries -- MRI from the inside
There is an ever-increasing need for advanced batteries for portable electronics, such as phones, cameras, and music players, but also to power electric vehicles and to facilitate the distribution and storage of energy derived ...
Google might launch Drive for cloud storage soon
(PhysOrg.com) -- Google's next big move, according to the Wall Street Journal, is a cloud storage service called Drive. Hardly first to the plate, Google is simply catching up to introducing its cloud reposi ...
A mitosis mystery solved: How chromosomes align perfectly in a dividing cell
Although the process of mitotic cell division has been studied intensely for more than 50 years, Whitehead Institute researchers have only now solved the mystery of how cells correctly align their chromosomes during symmetric ...
Lab study raises questions over nano-particle impact
Tests involving chickens have raised questions about the impact on health from engineered nano-particles, the ultra-fine grains commonly used in drugs and processed foods, scientists said on Sunday.
Starve a virus, feed a cure? Findings show how some cells protect themselves against HIV
A protein that protects some of our immune cells from the most common and virulent form of HIV works by starving the virus of the molecular building blocks that it needs to replicate, according to research published online ...
