(PhysOrg.com) -- Diesel engines, long confined to trucks and ships, are garnering more interest for their fuel efficiency and reduced carbon dioxide emissions, relative to gasoline engines. Argonne mechanical engineer Steve ...
Energy & Green Tech
Jun 14, 2011
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EPA Administrator Michael Regan last month made one of his agency's strongest statements to date about the danger of "forever chemicals." New restrictions on those pollutants in drinking water would "prevent thousands of ...
Environment
Apr 10, 2023
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Air pollution is more dangerous to the health of the average person on planet Earth than smoking or alcohol, with the threat worsening in its global epicenter South Asia even as China fast improves, a study showed Tuesday.
Environment
Aug 29, 2023
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The air we breathe contains particulate matter from a range of natural and human-related sources. Particulate matter is responsible for thousands of premature deaths in the United States each year, but legislation from the ...
Environment
Dec 25, 2017
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833
(Phys.org) —A team of climate experts from Britain's national weather service (The Met Office) has given a series of presentations at the Science Media Centre in London with the aim of trying to explain why global warming ...
Lung-penetrating dust from coal-fired power plants in the European Union claims some 23,000 lives a year and racks up tens of billions of euros in health costs, an NGO report said Tuesday.
Environment
Jul 4, 2016
151
107
(Phys.org) —Researchers at Oregon State University have discovered novel compounds produced by certain types of chemical reactions – such as those found in vehicle exhaust or grilling meat - that are hundreds of times ...
Environment
Jan 6, 2014
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Air pollution in Athens has surged in recent days because of people choosing wood over more expensive fuels to heat their homes in the grips of a continuing economic crisis, the environment ministry said Friday.
Environment
Dec 28, 2012
30
0
(Phys.org)—When Ovadia Lev, Professor of Environmental Chemistry and Health at The Hebrew University of Jerusalem, and his research team developed a new coating technology a few years ago, they thought it was an interesting ...
(PhysOrg.comOne of my pet peeves is the focus we have on global warming. While global climate change is important, it continues to provide a red herring of sorts, taking attention away the public health concern that is air ...
Particulates – also known as particulate matter (PM), suspended particulate matter (SPM), fine particles, and soot – are tiny subdivisions of solid matter suspended in a gas or liquid. In contrast, aerosol refers to particles and/or liquid droplets and the gas together. Sources of particulate matter can be man made or natural. Air pollution and water pollution can take the form of solid particulate matter, or be dissolved. Salt is an example of a dissolved contaminant in water, while sand is generally a solid particulate.
To improve water quality, solid particulates can be removed by water filters or settling, and is referred to as insoluble particulate matter. Dissolved contaminants in water are often collected by distilling, allowing the water to evaporate and the contaminants to return to particle form and precipitate.
Some particulates occur naturally, originating from volcanoes, dust storms, forest and grassland fires, living vegetation, and sea spray. Human activities, such as the burning of fossil fuels in vehicles, power plants and various industrial processes also generate significant amounts of particulates. Coal combustion in developing countries is the primary method for heating homes and supplying energy. Averaged over the globe, anthropogenic aerosols—those made by human activities—currently account for about 10 percent of the total amount of aerosols in our atmosphere. Increased levels of fine particles in the air are linked to health hazards such as heart disease, altered lung function and lung cancer.
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