This site uses cookies to improve your experience. To help us insure we adhere to various privacy regulations, please select your country/region of residence. If you do not select a country, we will assume you are from the United States. Select your Cookie Settings or view our Privacy Policy and Terms of Use.
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Used for the proper function of the website
Used for monitoring website traffic and interactions
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Strictly Necessary: Used for the proper function of the website
Performance/Analytics: Used for monitoring website traffic and interactions
A study by a pair of researchers at Northwestern University found that when fuel prices drove residents of São Paulo, Brazil, to switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20%. At the same time, nitric oxide and carbon monoxide concentrations tended to go up.
In a statement released this morning, President Barack Obama said he has requested that US Environmental Protection Agency (EPA) Administrator Lisa Jackson withdraw the agency’s draft Ozone National Ambient Air Quality Standards (NAAQS) rulemaking. Earlier post.) National Ambient Air Quality Standards (NAAQS).
The rapidly growing space industry may have a greater climate effect than the aviation industry and undo repair to the protective ozone layer if left unregulated, according to a new study led by UCL and published in the journal Earth’s Future as an open-access paper. Locations and fuel types of rocket launches in 2019. Ryan et al.
Essam El-Hannouny, a principal mechanical engineer at the Department of Energy’s (DOE) Argonne National Laboratory, won a Technology Commercialization Fund (TCF) Award from DOE to expand his research on how a renewable alcohol-based biofuel can serve as a dual fuel to help decarbonize locomotive engines. Image by Progress Rail.).
A University of Utah engineer has developed an inexpensive new method to remove oil sheen by repeatedly pressurizing and depressurizing ozone gas, creating microscopic bubbles that attack the oil so it can be removed by sand filters. The ozone in the bubble attacks certain pollutants because it is a strong oxidant.
Net warming from NO x emissions is a sum over warming (short-term ozone increase) and cooling (decreases in methane and stratospheric water vapor, and a long-term decrease in ozone) terms. In addition to CO 2 , air traffic causes condensation trails and nitrogen oxide (NO x ) emissions from the combustion of the airplane’s fuel.
Average greenhouse gas emissions (carbon dioxide equivalent) per passenger from flying were obtained from an online emissions calculator at myclimate (a nonprofit spin-off from the Swiss Federal Institute of Technology). One estimate is that on short flights takeoffs are responsible for as much as 25% of the total amount of fuel consumed.)
The Federal Highway Administration’s Congestion, Mitigation and Air Quality ( CMAQ ) program will provide $30 million to increase Colorado’s natural gas fueling infrastructure. The funds will provide for the statewide construction of compressed natural gas fueling stations and the purchase of natural gas vehicles (NGV).
The levels of these non-fuel-derived gases will likely remain unchanged, even as more drivers transition from gas-powered to electric vehicles. Cars’ average carbon dioxide emissions have dropped by 25% since the early 2000s, according to the US Environmental Protection Agency (EPA), but this gas only accounts for part of the total.
Renault’s comparison of the carbon footprint of EV and ICE vehicles over production, operation and end of life. Photochemical Ozone Creation Potential (kg Ethene equivalent). Quantifies the production of pollutant ozone (? to ozone layer), the results of the reaction of sunlight on NO x and volatile organic compounds.
The California Energy Commission unanimously adopted the 2013-2014 Investment Plan Update to support the development and use of green vehicles and alternative fuels. Funding priorities through the ARFVT Program support fuel and vehicle development to help attain the state’s climate change policies. million ZEVs on the state’s roads.
This program successfully committed $90 million over seven years for research, demonstration, and deployment projects to reduce the cost of fuel cells for transit use. The program gives priority consideration to the deployment of buses with the lowest energy consumption and least harmful emissions, including direct carbon emissions.
million to transit projects that improve emissions while supporting emerging clean fuel and advanced propulsion technologies. million from FTA’s Clean Fuels Grant Program and $49.9 million from FTA’s Clean Fuels Grant Program and $49.9 The US Department of Transportation will award up to total of $101.4
Of our "alternative fuel" options, only electricity can truly be made renewably (wind, solar, geothermal, small hydro), with no carbon or other noxious emissions. I blogged about this previously here. Yet another reason to think again about the ethanol craze in an article in today's LA Times.
The human health benefits associated with improvements in air quality related to the reduction in greenhouse gas emissions improvements can offset 26–1,050% of the cost of US carbon policies, depending upon the type of policy, according to a new study by a team from MIT. Carbon-reduction policies significantly improve air quality.
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. —Report to Congress on Black Carbon. Report to Congress on Black Carbon.
The San Joaquin Valley has been attainment for Carbon Monoxide (CO) since 1994, reached attainment for the federal PM 10 standard in 2008, and demonstrated attainment of the federal 1-hour ozone standard in 2014. The District is currently working on reaching attainment for the federal 8-hour ozone and PM 2.5 standards.
The study used two fuels—an E10 and E15. The summer-grade E10 fuel was sourced from four different refineries that were selected by CARB. The E10 fuels were blended together in four equal parts to create the final E10 fuel. One hybrid electric vehicle (HEV) equipped with a PFI engine was also used.
Relying more on natural gas would reduce emissions of carbon dioxide, but it would do little to help solve the climate problem. The study underscores the complex and sometimes conflicting ways in which fossil fuel burning affects Earth’s climate. —Tom Wigley. degree Fahrenheit (less than 0.1 degree Celsius).
The study was conducted in 2018 by West Virginia University’s Center of Alternatives Fuels, Engines, and Emissions (CAFEE). West Virginia University’s Center for Alternative Fuels Engines and Emissions (CAFEE) completed two types of tests at different times of the year during 2018 on four Blue Bird school buses.
Cutting HFCs, black carbon, tropospheric ozone, and methane can buy us about 40 years before we approach the dangerous threshold of 2°C warming. —co-author HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. Black Carbon. From Molina et al. Earlier post.) Mario Molina. (Dr.
Carbon dioxide accounted for 80% of this increase. After water vapor, the three most prevalent long-lived greenhouse gases are carbon dioxide, methane and nitrous oxide. This is primarily because of emissions from combustion of fossil fuels, deforestation and changes in land-use. parts per million) and the past decade (2.0
The program will demonstrate that a suite of commercially available, EPA-rail-certified engines present a near-term, low-risk solution to create an affordable RNG hybrid line-haul locomotive with near zero emissions while simultaneously improving fuel cost by 50%. g/bhp-hr of NOx, a reduction of 400 times. g/bhp-hr of PM.
Among the direct transportation-related provisions in the extensive package are a low-carbonfuel standard for all transportation fuels; financial support for large scale demonstrations of electric vehicles; and financial support for automakers retooling plants to make electric vehicles. Carbon Capture and Sequestration.
Furthermore, commercially available technologies, such as fuel efficient passenger vehicle tires, can be utilized by both new and in-use vehicles in the near-term to achieve GHG emission reductions. Achieving our long-term climate goal and 2032 ozone standards will require a much deeper penetration of ZEVs into the fleet.
California’s latest greenhouse gas data shows that while the state continues to stay below its 2020 target for emissions, there is much more work to do to achieve carbon neutrality by 2045. These programs cover transportation fuels, industrial emissions, vehicle emissions and emissions from electricity generation.
Researchers at Tohoku University in Japan have identified a way to reduce harmful NO emissions produced by ammonia fuel during combustion. The finding helps advance research into ammonia as an alternative to carbon-based fuels for cars, airplanes, and power generation facilities.
Hydrocarbons in the fuel from the engine can leak out through the air intake system when the car is not running. Traditional solutions involve adding an activated carbon honeycomb or filter to the air intake box to adsorb the hydrocarbons. However, these approaches increase the backpressure, reducing horsepower and fuel economy.
Contribution of gasoline and diesel exhaust to SOA over 0% to 50% diesel fuel use. SOA contributions from the two sources are equivalent at 6% diesel fuel use. The urban areas in California shown are for on-road fuel use only. The United States and California state averages shown are based on total on- and off-road use.
The US Environmental Protection Agency (EPA) has designated the five-county Philadelphia region of Bucks, Delaware, Chester, Montgomery and Philadelphia counties as non-attainment for ozone and fine particulate matter air quality standards. BCT anticipates the new CNG buses will displace 8,800 gallons of diesel fuel each year.
CARB also adopted a new plan to curb destructive “super pollutants” including black carbon, fluorinated gases and methane. The State SIP Strategy maps out a comprehensive suite of actions to deploy the next generation of clean vehicles, equipment and fuels. emissions by more than 20%. emissions by more than 20%.
Scientists from the US, Norway, Russia, Germany, Italy and China are participating in a study examining the potential role of black carbon, or soot, on the rapidly changing Arctic climate. Black carbon is contributing to this warming. Carbon is dark in color and absorbs solar radiation, much like wearing a black shirt on a sunny day.
The atmospheric level of carbon dioxide, which is the most important long-lived greenhouse gas influenced by human activities, is at its highest level in more than a million years. Data for the synthetic greenhouse and ozone depleting gases, such as CFCs, also are available. It is currently increasing at about 0.5 per cent each year.
The cap is enforced by requiring each source that operates under the cap to turn in one allowance or offset credit for every metric ton of carbon dioxide equivalent (MTCO 2 e) that it emits. The cap-and-trade program is expected to result in increased investment in efficient buildings and technologies and in advanced fuels. percent.
Stage II systems consist of special nozzles and coaxial hoses at each gasoline pump that capture vapors from the vehicle’s fuel tank and route them to the station’s underground or aboveground storage tank(s) during the refueling process. Stage I VRS apply to the gasoline distribution industry; Stage II to service stations.
Although viewed as a potential target in the global effort to reduce climate change, atmospheric black carbon particles absorb significantly less sunlight than scientists have predicted, according to a new study by an international team of researchers, published in the journal Science. Earlier post.).
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.
Decomposition of the decadal change in total global CO 2 emissions from fossil fuel combustion by four driving factors; population, income (GDP) per capita, energy intensity of GDP and carbon intensity of energy. giga tonne carbon dioxide equivalent (GtCO 2 eq) (2.2%) per year from 2000 to 2010 compared to 0.4 Click to enlarge.
Ocean acidification caused by the absorption of carbon dioxide in seawater is already increasing along the California coast decades earlier than existing models predict. The growth in carbon dioxide emissions from energy and industry has exceeded even the most fossil-fuel intensive scenario developed by the IPCC at the end of the 1990s.
In addition to CO 2 , other compounds such as ozone (O 3 ) precursors (nitrogen oxides (NO x =NO+NO 2 ), carbon monoxide (CO), and volatile organic compounds (VOCs)) and aerosols such as black carbon (BC) and organic carbon (OC) are emitted by ships.
eutrophication; ET = ecological toxicity; FEC = fossil energy consumption; WU = water use; LO = land occupation; “The rest” includes acidification; smog formation; ozone layer depletion; and human health effects. GW = global warming; Eut. Credit: ACS, Yang et al. Click to enlarge.
They can also be used as intermediates for the chemical synthesis of more complex carbon compounds such as fuel hydrocarbons. A method to convert biomass to methyl halides thus enables the transformation of biomass into drop-in chemicals and liquid fuels—e.g., fermentans for carbon and energy, and A. fermentans.
while the carbon intensity of its economy declined by 4.5%. Transportation sector emission sources include combustion of fuels utilized in-state that are used by on-road and off-road vehicles, aviation, rail, and water-borne vehicles, as well as a few other smaller sources. Compared to 2016, California’s GDP grew 3.6%
DOE selected this project to improve local air quality in the Houston-Galveston area, which is currently designated as a National Ambient Air Quality Standards (NAAQS) 8-hour ozone non-attainment area. million tons of carbon equivalents per year and an expected reduction in criteria pollutants of over 2,000 tons per year.
We organize all of the trending information in your field so you don't have to. Join 5,000+ users and stay up to date on the latest articles your peers are reading.
You know about us, now we want to get to know you!
Let's personalize your content
Let's get even more personalized
We recognize your account from another site in our network, please click 'Send Email' below to continue with verifying your account and setting a password.
Let's personalize your content