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Mexico economy
López Obrador – a hugely popular but controversial figure in Mexico – bequeathed more than ju...
BBC News
6 hours ago
Carbon emissions of richest 1% increase hunger, poverty and deaths, says Oxfam
The high carbon emissions of the world’s richest 1% are worsening hunger, poverty and excess deaths, a report has found. Owing...
The Guardian
7 hours ago
Jun 22, 2023 · One of the reasons the US was able to address air pollution in the past was the sources and solutions were straightforward. Cars create smog, so the US changed the regulations around their fuel ...
Oct 2, 2017 · 2015 — India’s government says air pollution killed 35,000 people over the past nine years. Epidemiologists say coal is cutting the average person’s life in India by about three years, but this has not yet led to any meaningful action. Pressure to take steps against climate change may help.
Abstract This article proposes and evaluates four hypotheses about US pollution and environmental policy over the past half century. First, air and water pollution has declined substantially, although greenhouse gas emissions have not. Second, environmental policy explains a large share of these trends. Third, much of the regulation of air and drinking water pollution has benefits that exceed ...
- Air Pollution Challenges: Common Pollutants
- Air Pollution Challenges: Climate Change
- Air Pollution Challenges: Toxic Pollutants
- Air Pollution Challenges: Protecting The Stratospheric Ozone Layer
Great progress has been made in achieving national air quality standards, which EPA originally established in 1971 and updates periodically based on the latest science. One sign of this progress is that visible air pollution is less frequent and widespread than it was in the 1970s. However, air pollution can be harmful even when it is not visible. ...
EPA determined in 2009 that emissions of carbon dioxide and other long-lived greenhouse gases that build up in the atmosphere endanger the health and welfare of current and future generations by causing climate change and ocean acidification. Long-lived greenhouse gases, which trap heat in the atmosphere, include carbon dioxide, methane, nitrous ox...
While overall emissions of air toxics have declined significantly since 1990, substantial quantities of toxic pollutants continue to be released into the air. Elevated risks can occur in urban areas, near industrial facilities, and in areas with high transportation emissions.
The ozone (O3) layer in the stratosphere protects life on earth by filtering out harmful ultraviolet radiation (UV) from the sun. When chlorofluorocarbons (CFCs) and other ozone-degrading chemicalsare emitted, they mix with the atmosphere and eventually rise to the stratosphere. There, the chlorine and the bromine they contain initiate chemical rea...
Apr 22, 2021 · In 1980, the average AQI across US counties was 59.6, a value considered in the moderate range given its effects on human health. By 2020, the value had fallen to 36.4, reaching the range considered good. This is one way to estimate the air quality in the average place in the US. Another method uses a population-weighted average to estimate the ...
Sep 28, 2020 · Nevertheless, laws to control air pollution that are recognizably modern did develop through the latter part of the nineteenth century, and these also reflected the sanitary reform that characterized the broad public health concerns of the time . As might be expected, they were common in Europe and North America, but also followed imperial administrations across the world, so were well known ...
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Nov 7, 2023 · The United States currently has modest levels of air pollution after decades of clean air actions. Dr Colette Heald, an atmospheric chemist at the Massachusetts Institute of Technology, speaks to ...
