Environmental

Recent Posts

Study warns of potential increase in global mercury emissions, which would impact animals in Arctic region
Posted on 15 May 2011 by Thomas H. Clarke, Jr.

An assessment by a scientific body set up by the eight Arctic rim countries has projected that global mercury emissions could grow by 25% by 2020 if no action is taken to control such emissions, posing a threat to polar bears, whales, and seals and the... Read More

EPA proposes draft rules related to air emissions from hydrofacturing operations
Posted on 2 Aug 2011 by Thomas H. Clarke, Jr.

EPA has released rule changes that will require oil and gas drillers that use hydraulic fracturing to use new or improved processes and equipment in an attempt to reduce the level of volatile organic compounds (VOC's) and other air pollutants emitted... Read More

Let a thousand lawsuits bloom: The CAA is this week's favorite target
Posted on 12 Oct 2011 by Thomas H. Clarke, Jr.

As noted in prior posts, EPA has proposed national standards for mercury and other toxic pollutant emissions from power plants. See http://www.epa.gov/airquality/powerplanttoxics/ . Now Guam and 25 states have filed a challenge to the regulations. The... Read More

Revisions to Key Definitions in Virginia Air Pollution Program Add Flexibility
Posted on 20 Oct 2015 by Williams Mullen

By Henry R. "Speaker" Pollard, V , Partner, Williams Mullen Changes to Virginia’s air program that recently took effect offer greater flexibility for manufacturers, electric utilities, and other major sources of air pollutants. These... Read More

Air pollution may be causing mega-cyclones striking India & the Middle East
Posted on 11 Nov 2011 by Thomas H. Clarke, Jr.

It is well known that warm sea-surface temperatures can boost the intensity of hurricanes (known in the Indian Ocean as cyclones). For many decades water in the Arabian Sea has been warm, which should enhance the strength of cyclones. However, regional... Read More

EPA Releases Final Health Assessment for Tetrachloroethylene (aka Perc)
Posted on 15 Feb 2012 by Thomas H. Clarke, Jr.

EPA has posted its final health assessment for tetrachloroethylene (aka perc) to its Integrated Risk Information System (IRIS). Perc is widely used in the dry cleaning industry, although states such as California are requiring that it be phased out... Read More

Nanoparticles Impair Blood Vessel Function
Posted on 6 Apr 2012 by Thomas H. Clarke, Jr.

Prior posts have noted the wide range of materials and consumer products in which nanoparticles are used, and also that nanoparticles can cross the so-called blood-brain barrier. New research, using animal models, suggests that such materials may impair... Read More

Composition of diesel exhaust varies with engine loading, producing differential health impact characteristics from the emissions
Posted on 2 Aug 2011 by Thomas H. Clarke, Jr.

As noted in several prior posts, the study of the impact on diesel exhaust has focused on the PM10 and PM 2.5 profiles of the emissions. Recently, researchers argued that this view is too simplistic, and present an interesting study in support of their... Read More

Some aircraft designers think outside the box to improve efficiency
Posted on 24 Mar 2011 by Thomas H. Clarke, Jr.

Concern has been expressed in recent years over the contribution of aircraft to GHG emissions. Some airlines have gotten favorable publicity for experimenting with bio-derived fuels. But, what if aircraft were to target reducing fuel consumption by half... Read More

Air pollution may be causing mega-cyclones striking India & the Middle East
Posted on 11 Nov 2011 by Thomas H. Clarke, Jr.

It is well known that warm sea-surface temperatures can boost the intensity of hurricanes (known in the Indian Ocean as cyclones). For many decades water in the Arabian Sea has been warm, which should enhance the strength of cyclones. However, regional... Read More

Arctic salt clouds are reducting the impact of Global Climate Change on the Arctic region
Posted on 15 May 2011 by Thomas H. Clarke, Jr.

Prior posts have noted both the various impacts of Global Climate Change ("GCC") on various aspects of the Earth and its atmospheric systems, as well as the failure of many/most models to include such impacts within their parameters. For example... Read More

EPA Releases Final Health Assessment for Tetrachloroethylene (aka Perc)
Posted on 15 Feb 2012 by Thomas H. Clarke, Jr.

EPA has posted its final health assessment for tetrachloroethylene (aka perc) to its Integrated Risk Information System (IRIS). Perc is widely used in the dry cleaning industry, although states such as California are requiring that it be phased out... Read More

Congressional Republicans and Senate Democrat Introduce Bills to Prevent Regulation of Greenhouse Gas Emissions
Posted on 14 Feb 2011 by William L. Kaplowitz

By William Kaplowitz , Associate, Jenner & Block On January 5, 2011, Rep. Marsha Blackburn (R-Tenn.) introduced a bill, H.R. 97, that would prevent EPA from regulating greenhouse gas (GHG) emissions under the Clean Air Act. The bill, which has... Read More

9th Circuit upholds California's Vessel Fuel Rules in face of constitutional challenge
Posted on 4 Apr 2011 by Thomas H. Clarke, Jr.

Prior posts have noted that California issued Vessel Fuel Rules designed to reduce air pollution created by ships moving along the coast. The Pacific Merchant Shipping Assoc. sued, alleging that it was unconstitutional to apply such rules to shipping... Read More

Composition of diesel exhaust varies with engine loading, producing differential health impact characteristics from the emissions
Posted on 2 Aug 2011 by Thomas H. Clarke, Jr.

As noted in several prior posts, the study of the impact on diesel exhaust has focused on the PM10 and PM 2.5 profiles of the emissions. Recently, researchers argued that this view is too simplistic, and present an interesting study in support of their... Read More