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Less traffic on the roads during the first COVID-19 lockdown in the UK led to a reduction in air pollution but may have caused potentially damaging surface ozone levels to rise, according to a new study led by researchers at the University of York. 20, 15743–15759 doi: 10.5194/acp-20-15743-2020. These results are a cautionary tale.
New analysis has found increasing emissions of several ozone-depleting chemicals despite their production being banned for most uses under the Montreal Protocol—and a loophole in the rules is likely responsible. According to the researchers, emissions from these CFCs currently do not significantly threaten ozone recovery.
Levels of two major air pollutants have been reduced significantly since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant—ground-level ozone—has increased in China, according to new research. Ozone is harmful to humans at ground-level, causing pulmonary and heart disease. —Guy Brasseur.
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).
Large improvements of air quality in China during the lockdown have been widely reported, but new research shows that two pollutants harmful to human health—fine particulate matter (PM 2.5 ) and ozone—were only slightly reduced. and ozone were only slightly reduced or barely affected.
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. The space industry is one of the world’s fastest growing sectors.
Since systemically integrated hydrogen production is important to the researchers, they will not only be using the hydrogen produced during electrolysis but also the oxygen—for welding processes or for ozonation in sewage treatment plants, for example.
The market for water treatment for hydraulic fracturing (“fracking”) to produce previously inaccessible shale gas will grow nine-fold to $9 billion in 2020, according to a new report from Lux Research. EcoSphere combines ozone, cavitation, and electrochemistry, and the $9 million company leads in the “Dominant” quadrant.
EPA’s TAG program aims to reduce air pollution in areas of the nation with the highest levels of ambient ozone and fine particulate matter (PM 2.5 ) pollution. Launched in 2020 by Hyundai Motor, XCIENT Fuel Cell is the world’s first mass-produced hydrogen fuel cell electric heavy-duty truck.
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. Negative RF (cooling) contributions arise from sulfate aerosol production. Net warming from contrail cirrus is a sum over the day/night cycle.
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. California statewide GHG emissions dropped below the 2020 GHG Limit in 2016 and have remained below the 2020 GHG Limit since then.
The objective of the emission impact analysis was to respond to EPA’s request for comments as to the merits of reducing NO x emissions from heavy-duty trucks by 50 to 90% as outlined in the 6 January 2020 Advance Notice of Proposed Rulemaking (ANPR) of the CTI. Source: MECA. ppb in the west (San Bernardino, CA) and 4.9
From 2005 through 2020, total US greenhouse gas (GHG) emissions are projected to rise by 4% under a “with measures” scenario (but without a cap-and-trade program and other complementary policies), from 7,109 Tg CO 2 Eq. from 2005 to 2020. to 7,416 Tg CO 2 Eq., to 7,416 Tg CO 2 Eq., to 1,853 Tg CO 2 Eq. 5,813 Tg CO 2 Eq. 332 Tg CO 2 Eq.
They found that reductions in ground ozone during this 35-year period resulted in $600 million in increased production annually by the early 2010s. Another difference is that some grains can be annually modified to withstand greater heat and even higher ozone levels in the air. An open-access paper on the work appears in Nature Food.
pinene into the chamber and caused the compound to react with ozone. Slowik (2020) “On the fate of oxygenated organic molecules in atmospheric aerosol particles ” Science Advances doi: 10.1126/sciadv.aax8922. For this they used the PSI smog chamber, in which processes in the atmosphere can be simulated. Resources. Pospisilova, F.
The project provides financial and other incentives for ocean-going vessels to reduce their speed in specified areas along the coast during peak ozone and migratory whale seasons. These reductions decrease air pollution and the mortality rate of endangered whales.
Deterioration of the ozone layer [kg CFC-11-eq.]. 2020) Submitted to Renewable and Sustainable Energy Reviews. The system will graph lifecycle impact for a range of specified powertrains, for a large number of impact categories: Climate change [kg CO 2 -eq.]. Depletion of fossil energy resources [kg oil-eq.]. in review).
Radiative forcing due to perpetual constant year 2000 emissions grouped by sector for 2020 (left) and 2100 (right) showing the contribution from each species. In their analysis, motor vehicles emerged as the greatest net contributor to atmospheric warming now and in the near term, with a total radiative forcing of 199 mWm -2 in 2020.
EPA expects that any update to the standards will result in significant mobile source NO x reductions, which will aid communities across the country in the attainment of ozone and particulate matter standards. EPA intends to publish a proposed rule in early 2020. The Agency is not required by statue to update the standard.
Global ozone-depleting substances (ODSs) and HFC emissions (A), global CO 2 and HFC emissions (B), and ODS, HFC, and CO 2 global RF (C) for the period 2000–2050. These HFCs, gases used in refrigerators and air conditioners, are substitutes for ozone-depleting gases, but they are also strong greenhouse gases. Velders et al.
Approximately 70% of the reductions needed to meet the ozone standard in the South Coast in 2031 would come from existing or proposed regulatory actions. That rule, which the Board will take up later today, will be fully in effect by 2020. emissions by more than 20%. emissions by more than 20%.
Gentner noted, though, that the effect of asphalt emissions on ozone formation was minimal compared to that of motor vehicles and volatile chemicals in personal care and cleaning products—another key emerging source of reactive organic emissions that produces large quantities of SOA in urban areas. Presto, Drew R.
Chlorofluorocarbons (CFCs)—commonly used in refrigerators and air conditioners—play a role in creating a hole in the ozone layer over Antarctica. 2 in 2020, before declining by approximately 26% by 2050, despite continued growth of fully fluorinated greenhouse gas emissions.
VIP is part of the state’s overall plan to cut toxic diesel emissions 85 percent by 2020. California is currently working toward meeting clean-air standards for ozone and particulate matter emissions.
However, 100 million people live in areas of nonattainment for ozone and particulate matter (PM), and according to EPA estimates, heavy-duty vehicles will continue to be one of the largest contributors to NO x emissions—a precursor of ozone and PM formation—from the transportation sector in 2025.
EPA conducted a regulatory impact analysis (RIA) that looks at illustrative benefits and costs of the proposed NSPS for the years 2020 and 2025. The 2020 estimates reflects a single year of benefits and costs for sources that become affected in that year. Net benefits are estimated at $35 million to $42 million.
In 2017, emissions from GHG emitting activities statewide were 424 million metric tons of CO 2 equivalent (MMTCO 2 e), 5 MMTCO 2 e lower than 2016 levels and 7 MMTCO 2 e below the 2020 GHG Limit of 431 MMTCO 2 e. These reductions have occurred while California’s economy has continued to grow. Compared to 2016, California’s GDP grew 3.6%
That the reduction has not materialized—and that global emissions have instead risen—is a puzzle, and may have implications for the Montreal Protocol, the international treaty that was designed to protect the stratospheric ozone layer. —Dr Stanley. Resources. Stanley, D. Krummel, D. O’Doherty, P. Salameh, P. Simmonds, R.
The cap then declines about 2% in 2014 and then about 3% annually from 2015 to 2020. By 2020 the state is intended to reach the equivalent of the 1990-level of greenhouse emissions, as required under AB 32, California’s climate change legislation. the destruction of existing stores of ozone-depleting substances in the U.S.
NASA has a suite of incremental goals for demonstrating the feasibility of aircraft technology and air traffic management techniques that can minimize the environmental effects of air transportation by: Enabling aircraft to burn 33% less fuel than today’s most efficient models by 2015, 50% less by 2020, and better than 50% less by 2025.
In addition, the program funds projects that assist in fulfilling Governor Brown’s Zero Emission Vehicles (ZEV) Action Plan, with a target of installing enough infrastructure to support 1 million ZEVs by 2020, and a 2025 target of having 1.5 million ZEVs on the state’s roads.
The two vehicles, working together to gather upwind and downwind readings of sources, will monitor for methane, nitrous oxide, carbon dioxide, halocarbons, sulfur hexafluoride, carbon monoxide, ozone and particulate elemental carbon; as well as particulate matter size and distribution. While California’s population is less than 0.5%
A portion of downstate New York State does not meet federal health based national ambient air quality standards (NAAQS) for ozone and has been categorized as a non-attainment area. million registered vehicles.
By the end of the program in 2020 there will be a 15% reduction in greenhouse gas emissions compared to today, reaching the same level of emissions as the state experienced in 1990, as required under AB 32. There are also provisions to develop international offset programs that could include the preservation of international forests.
Development of sustainable communities strategies can also provide an opportunity for associated criteria pollutant emission reductions that will be needed to attain air quality standards for ozone and particulate matter as well as reduce near-roadway exposures.
Given the beneficial emissions and cost analysis, combined with China’s previous experience transitioning away from CFC-12, there are no vehicle-production barriers preventing a complete phase-out of HFC-134a in the China light-duty vehicle fleet during the five-year period between 2020 and 2024.
The program is expected to reduce GHG emissions between 18 and 27 MMTCO 2 e in 2020. The cap will decline to a level in 2020 designed to ensure that emissions decline over time and California achieves the AB 32 GHG emissions target in 2020. Allowance Distribution and Trading. Offset Protocols. Resources.
While current state and federal measures are on target to reduce toxic diesel locomotive emissions 65% or more by 2020, additional measures recommended by ARB staff would ultimately provide up to 85% or greater emissions reductions within the rail yards over the same period, resulting in cleaner air for nearby residential neighborhoods as well.
They focused their comparison on techniques used in a three-dimensional model commonly used by environmental agencies to simulate ozone, particulate matter, and atmospheric acid concentrations, and develop effective emission reduction strategies. Stockwell, Emily Saunders, Wendy S. Goliff & Rosa M.
Many ports and related freight corridors and facilities are located in nonattainment or maintenance areas for EPA’s ozone and PM 2.5 national ambient air quality standards (NAAQS). Source: National Port Strategy Assessment. Click to enlarge. In 2030, adding plug-in hybrid electric vehicles to these fleets could yield even more NO x and PM 2.5
Alliance for Pulp & Paper Technology Innovation (APPTI) (formerly Agenda 2020 Technology Alliance) will partner with NREL and ORNL to improve pulp yield during kraft pulping process in a project titled “Molecular Modeling to Increase Kraft Pulp Yield”. The project will be fully funded by the Vehicle Technologies Office.
MARPOL Annex VI sets limits on NO x and SO x emissions from ship exhaust, and prohibits deliberate emissions of ozone-depleting substances. This limit is scheduled to reduce to 0.5% (5,000 ppm) in 2020, although members of the shipping industry are currently calling for IMO to delay the requirement until at least 2025. Earlier post.).
As the trend toward cleaner technologies with reduced exhaust emissions continues through the use of catalytic converters, diesel particulate filters (DPF), and improved fuels and engines, non-exhaust PM will soon surpass exhaust emissions and may well become dominant by 2020 both in terms of emissions and contributions to air quality.
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