The United States has made progress in cleaning up air pollution, but 154.5 million people, about half the population, live where the air is so polluted with smog and particles that it is often dangerous to breathe, according to the State of the Air 2011 report. Nearly half the people in the United States, 48.2 percent, live in counties that received an "F" for air quality due to unhealthy ozone levels. Los Angeles-Long Beach-Riverside, California remains the metropolitan area with the worst ozone problem, although great improvements have been made since the report was first issued 12 years ago. In fact, eight of the 10 most ozone-polluted cities are in California, the report shows. Honolulu, Hawaii and Santa Fe-Espanola, New Mexico are identified as the cleanest cities – the only two cities in the nation that were among the cleanest for year-round particle pollution and also had no days when ozone and daily particle pollution levels reached unhealthy ranges.
Source: American Lung Association, 27 April 2011
Europe should take an integrated approach to nitrogen management. This is the main message of the European Nitrogen Assessment, a new report launched during the "Nitrogen and Global Change" conference, in Edinburgh (UK) from 11–14 April, 2011.
The number of premature deaths in Europe caused by air pollutant emissions from international shipping is estimated to amount to approximately 49,500 in the year 2000, and rise to 53,200 in 2020.
There are sufficient resources to provide the world with renewable energy. The main constraint on development is public policy, that is the main message in a new IPCC report.
A handful of measures targeting black carbon and tropospheric ozone can reduce future global warming by 0.5°C, according to a UNEP and WMO report.
Germany's lignite power plants still dominate the CO2 list. Serbia is registering emissions for the first time and enters both the NOx list and the SO2 list.
Mercury emissions from coal-fired plants can be cut by well over 90 per cent, but this fact has so far been neglected in ongoing talks for a revised Heavy Metals Protocol.
As no revision of the European Air Quality legislation is planned until at least 2013, the EU has said it will focus on source-oriented legislation in the meantime. Often neglected in comparison to regulations concerning road vehicles, the so-called "non-road" sector, which includes locomotive ..
"Curbing mobility is not an option," says the European Commission in a new roadmap for the transport sector, expressing a view that immediately sparked criticism.
Prompt action is required to further reduce particulate matter, ground-level ozone, and nitrogen dioxide – an EU clean air strategy should be adopted in 2013.
Significant environmental improvements can be achieved while additional costs still stay well below 0.1 per cent of GDP. Moreover, health benefits alone outweigh the costs by ten times or more.