Threats posed at each stage of the oil lifecycle include:
Extraction: Occupationally-related fatalities among workers in the oil and gas extraction processes are higher than deaths for workers from all other US industries combined. Oil well workers risk injury and chronic disease from exposure to chemicals such as cadmium, arsenic, cyanide, lead and polycyclic aromatic hydrocarbons (PAHs).
Oil Transport: Many leaks and spills occur in developing nations where pipeline and oil rig safety regulations are inadequately enforced, posing particularly high threats to local environments and human communities.
Refining: Refinery workers' health is threatened through accidents and from cancer (leukemia), associated with exposure to petroleum by-products such as benzene. Again, these threats are even greater in developing nations and poor communities where labor, safety, emissions standards and environmental laws are lacking or weakly enforced.
Combustion: Chemical and particulate air pollution are related to heart and lung disease (chronic obstructive lung disease and asthma) and premature death. Acid rain leaches lead, copper and aluminum into drinking water and climate change caused by excess carbon dioxide levels in the atmosphere are associated with more extreme weather events and the spread of infectious diseases.
http://www.med.harvard.edu/chge/oilpress.htmlwww.med.harvard.edu/chge/oilreportex.pdf
Oil Refining
• Oil, by-products and chemicals used in the refining process
cause chemical, thermal, and noise pollution.
• Oil refining affects the health and safety of refinery workers
through accidents and from chronic illness (e.g., leukemia)
associated with exposure to petroleum and its by-products
(e.g., benzene).
• Petroleum refineries present major health hazards for human
communities living near refineries, and for marine and terres-
trial ecosystems where they are situated.
• Gasoline and many of its additives can lead to acute and
chronic toxicity, and is associated with some types of cancer.
• Groups at high risk for exposure to gasoline and its additives
include: employees in the distribution, storage and pumping of
gasoline; people living near refineries, transfer and storage
facilities, and service stations; automobile drivers who pump
their own gas; people who live in houses with attached
garages; and those whose drinking water has been contaminat-
ed with gasoline.
Combustion: Air Pollution
• Gas flaring at the point of extraction is a source of air pollu-
tion.
• The additives and products of oil combustion, VOCs, NOxs,
SOxs, CO, CO2, PM-10s, PM-2.5s and Pb (definitions below),
have numerous environmental and human health impacts.
• Chemical and particulate air pollution are related to heart
and lung disease (chronic obstructive lung disease and asthma)
and premature death.
• NOxs and VOCs combine to form ground level ozone (O3)
or photochemical smog.
• This reaction is temperature-dependent; thus warming
increases the formation of photochemical smog and may
reverse gains made in attaining ground level ozone standards.
• Subsequent to the 1970 Clean Air Act, the US has made sub-
stantial efforts towards controlling air pollution. However,
studies demonstrate that even allowable levels of many of the
pollutants result in significant negative health effects.
Combustion: Acid Rain
• Acids formed from oxides of nitrogen (NOxs) and sulfur
(SOxs) acidify all forms of precipitation.
• The anticipated recovery of acidified soils appears to be a
longer, more protracted process than originally projected, as
the depletion of minerals (calcium and magnesium) persists
even after correction of soil acidity.
• Calcium and magnesium deficiencies in soils harm plants
and animals.
• Acidification leaches lead, copper and aluminum into drink-
ing water.
• NOxs from oil combustion (along with sewage and fertiliz-
er runoff) cause eutrophication of lakes, estuaries and marine
coasts.
• Eutrophication (excessive nitrogen and phosphorus) con-
tributes to harmful algal blooms in inland waters and coastal
"red tides" that contaminate seafood, and leads to biologically
unproductive "dead zones".
Combustion: Climate Change
• Over the past 150 years, human activities - including the
combustion of fossil fuels and land clearing - have altered the
levels of atmospheric greenhouse gases; the most important
being carbon dioxide.
• CO2 levels are now greater than they have been for 420,000
years and they are rising.
• Land surfaces and the deep ocean are warming, altering
Earth's ice cover, accelerating the hydrological (water) cycle
and changing global weather patterns.
• Droughts are becoming more severe and persistent, adding
to the depletion of fresh water supplies in water-stressed areas,
and increasing the vulnerability of agricultural resources.
• Melting of permafrost threatens the integrity of northern lat-
itude pipelines.
• Warming and the accompanying extreme weather events
threaten health, forests and marine coastal ecosystems.
Compounds
NOxs - Oxides of Nitrogen
SOxs - Oxides of Sulfur
H2S - Hydrogen Sulfide
CO - Carbon Monoxide
CO2 – Carbon Dioxide
PM-10s - Particulate matter with
a diameter of 10 microns or less
PM-2.5s - Particulate matter with
a diameter of 2.5 microns or less
Pb – Lead
PAHs - Polycyclic Aromatic
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