Pollution in Canada

Pollution is an environmental issue in Canada. It has posed health risks to the Canadian population and is an area of concern for Canadian lawmakers. Air, water and soil pollution as well as the health effects associated with these three types of pollution, are prominent points of contention in modern Canadian society.

Leduc oil

Air pollution

Air pollution in Canada is contributed by industrial and vehicular emissions, agriculture, construction, wood burning and energy production.[1] A recent report found that Canadian companies contributed 73% more to air pollution than companies in the United States.[2] Within the 73% more emissions it was found that Canadian companies contributed 29% more respiratory toxins into the air than the U.S."[2] While Canadian businesses may release more emissions than those in the U.S, overall emissions have decreased in the past few years. This can be evidenced with Environment Canada's 2010 document named Air Pollutant Emission Summaries and Historical Emission Trends.[3] This report found that 2010 emissions, when compared to 2009 emissions, saw an overall decrease.[3] Additionally, it was found that heavy metals and persistent organic pollutants (smog precursors) were at lower levels in 2010 than in 1990.

Oil sands pollution
Further information: Athabasca oil sands § Environmental impacts

While overall pollution levels have dropped, it was found that oil sands pollution has increased by 20% since 2009.[4] According to a 2009 study, Alberta’s oil sands are one of the major causes of air pollution in Canada.[5] Tar sands facilities were found to be among the top four highest polluters of volatile organic compounds (VOCs)- a major air contaminant.[5] VOCs and other air contaminants are set to increase in the future as a result of continued output from the oil sands.[5] Oil sands pollution is not only set to increase VOCs, but also, acid rain.[6] Acid rain is rain that has been contaminated by airborne chemicals, making it acidic.[7] Two major causes of acid rain are sulphur dioxide and nitrogen oxide.[8] Acid rain can cause damage to soil, water, wildlife, plants and buildings. Additionally, the airborne particles that cause acid rain can also contribute to smog.[8] In recent years progress has been made in reducing acid rain, however, Alberta's oil sands may soon set back this progress.

Pollution from oil wells

In southeastern Saskatchewan, air pollution from oil production has breached provincial air quality standards hundreds of times since 2014.[9]

Canada/United States transboundary pollution

In recent years, the Canada-United States Air Quality Agreement, signed on 13 March 1991, has improved air quality by reducing sulfur dioxide and nitrogen oxide emissions in both countries.[10] The agreement was meant to address the issue of transnational air pollution between the two countries. The agreement was expanded in 2000 to also include goals of reducing emissions of volatile organic compounds and levels of ground-level ozone.[10] Ground-level ozone is caused by reactions between nitrogen oxides and VOCs in the presence of sunlight. Ozone is a contributor to smog and is known to cause numerous respiratory diseases.[11] The 2012 Canada-United States Air Quality Agreement Progress Report found that "Canada's total emissions of sulfur dioxide have decreased by 57% from 1990 levels while the U.S. has reduced total sulfur dioxide emissions from covered sources by 67% from their 1990 emission levels. Between 2000 and 2010, Canada reduced total emissions of nitrogen oxides by 40% in the transboundary ozone region while U.S. total nitrogen oxide emissions decreased by 42% in the region".[12]

While transnational pollution between the United States and Canada has decreased many Canadians still say they contend with polluted air as a result of drifting pollution from the U.S. In 2006 the government of Ontario announced that "5,000 premature deaths caused by smog in the province every year can be attributed to air pollution that crosses the Canada-U.S. border."[13] Additionally, the then (2006) mayor of Halifax, Peter Kelley, also proclaimed "over 50 per cent of air pollutants over New Brunswick and Nova Scotia are from the U.S. For us, we're trying to deal with what's coming our way, but also what we generate here as well."[13] In an attempt to combat the pollution a petition was created. In 2006 the petition was filed by thirteen Canadian municipalities to the U.S. Environmental Protection Agency calling for a reduction in coal-fired plants.[13]

Climate Change Accountability Act

The Climate Change Accountability Act called for greenhouse gas emissions to be 25% below 1990 levels by 2021, and 80% below 1990 levels by 2050. Although the bill was passed by the House of Commons, the bill was defeated by the Senate. Environment Minister Jim Prentice stated in early 2010 that the new goal for greenhouse gas emissions would be 17% below 2005 levels by 2020, the equivalent of a 3% increase from 1990.[14]


Water pollution
See also: Water supply and sanitation in Canada

Water pollution is not a major problem nationally, although it can be a source of concern in some localities. Major causes of water pollution in Canada include acid rain, groundwater contamination and unclean wastewater.[15]

Oil sands pollution

As previously stated, Alberta's oil sands are set to cause growing levels of acid rain consequentially leading to an increase in water contamination in the area. Acid rain will cause Canada's lakes and rivers to become further acidified. This is a problem as it decreases levels of surface water calcium. This lower concentration of calcium is already having particularly adverse effects on plant life, as can be seen with the Daphnia species-an important food source for aquatic species and marine life.[16]

A recent study at the University of Alberta found levels of metals like arsenic, lead and mercury to be considerably higher than national guidelines in water downstream from Albertan oil sites.[17] This pollution could potentially result in harmful health implications for fish and other wildlife.[17] The study further discerned that their findings were "contrary to claims made by industry and government" who purported that "pollutants are from natural sources and not from the expanding production of oil from tar sands."[17]

Other than contributing to acid rain and high levels of metals in water, sites of oil production can also cause significant damage by human error and runoff. A prominent example is the 2007 case involving the Athabasca River. Due to human error, energy magnate Suncor spilled 9.8 million liters of oil sands waste water into the river causing adverse effects for people and wildlife in the area.[5] The Athabasca River can also be used as an example of oil sands runoff. It was found that the Athabasca's waters, which are downstream from the oil sands, had higher concentrations of pollutants as a result of runoff.[18] High concentrations of pollutants can have serious consequences for wildlife and humans. Recently, it was reported that there were significant increases in fish deformities as well as an increase in cancer rates in a Native community downstream from the Athabasca.[19]

Great Lakes pollution

Pollution of the Great Lakes, the world’s biggest bodies of fresh water,[20] continue to be a significant problem for both Canada and the United States. According to Derek Stack, executive director of Great Lakes United, "High pollution levels in the Great Lakes basin continue to take an apparent toll on the air and water quality of the ecosystem."[21] In 2002, it was reported that the Great Lakes basin was home to 45% of all toxic air pollution in Canada, in turn affecting the Great Lakes' water.[22] An even more recent report suggests that the Alberta oil sands' impact could reach as far as the Great Lakes.[23] The report warns that "[oil] refineries will be using the Great Lakes ‘as a cheap supply’ source for their copious water needs and the area’s air ‘as a pollution dump'."[23]

In September 2012, the United States and Canada signed amended version of the Great Lakes Water Quality Agreement.[24] The overarching purpose of the Agreement is to "restore and maintain the chemical, physical and biological integrity of the waters".[24] Significant amendments made to the Agreement include "address[ing] aquatic invasive species, habitat degradation and the effects of climate change, and support continued work on existing threats to people's health and the environment in the Great Lakes Basin such as harmful algae, toxic chemicals, and discharges from other vessels".[24] However, some people contend that the changes made to the Agreement while good in principle, lack the "hard number goals, and actions to reach them."[25]

Arctic waters pollution

Under the 1970 Arctic Waters Pollution Prevention Act, the Canadian government established a document to prevent pollution of Canadian Arctic waters. However, in recent years Arctic waters have become increasingly polluted. It was recently found that due to pollution some waters have levels of lead that are higher than the Canadian guidelines.[26]

Coastal communities that emit waste also contribute to arctic pollution. Arctic coastal communities do not presently have the infrastructure necessary to properly deal with their waste, this could lead to greater pollution in the future as these communities continue to grow in size.[26] Other than coastal communities, waste and litter from the rest of the world continues to be a significant issue in the Arctic, with waste levels doubling in the past ten years.[27] The most significant types of litter found are plastic items and plastic bags.[27]

Pollution from sewage

The Guidelines for Canadian Drinking Water Quality are guidelines for drinking water quality standards in Canada developed by Health Canada. These guidelines set forth recommendations for the maximum concentrations of various substances in drinking water. Provinces and territories are responsible for enforcing these guidelines, as there is no national regulatory body for drinking water.[28] Water pollution by sewage is one of the main culprits involved in polluting drinking water.[29] Advocacy group Ecojustice estimates overall raw sewage dumping in Canada to be around 200 billion litres a year.[30] The Canadian government recently announced waste water regulations that would allow for sewage to be dumped into Canadian waters until 2040.[31] Proper measures for waste water disposal will not immediately be put in place, rather, they will be implemented gradually from 2020 to 2040. However, in the meantime, Canadian municipalities may continue to pollute their waters by dumping sewage. This can prominently be viewed with Halifax, Nova Scotia. In Halifax, human waste is dumped directly into the Halifax harbour.[30] This dumping can mainly be attributed to a failure in their sewage treatment infrastructure.[30] Victoria, British Columbia also follows a similar practice by getting rid of their untreated waste into the ocean.[30] However, the government has plans to open operational treatment facilities for 2016.[30]

Water pollution resulting from sewage can also be attributed to error in sewage facilities. A recent example can be evidenced with Ottawa. In 2004 Ottawa experienced a 190 million liter raw sewage spill into the Ottawa River.[32] Similarly, Winnipeg, released "partially treated sewage water into the Red River for seven weeks" in 2011.[33] However, in this case, the city was actually charged for their pollution.[33] Numerous other places like Richmond B.C and Calgary A.B, have experienced significant sewage spills in their native waters.[32]

Soil pollution
See also: Soil contamination

While soil pollution is present in Canada, it is not yet an area of great national concern. Some of the main causes of soil pollution include chemical/oil spills into the ground, road salt, excessive pesticide use by farmers, acid rain, and polluted water.[34]

Soil degradation/pollution

As Environment Canada mentions "soil degradation degrades the land and places significant stress on ecologically sensitive biota and flora".[35] Soil degradation in Canada's biologically sensitive forests as a result of pollution, is one of the most significant cases of degradation in the country. One study found that 12% of Alberta's forests’ soils are over their acid carrying capacity.[36] This rise in acidity is attributed to the continual extraction of fossil fuel from the Alberta oil sands.[36] Oil refinery sites, like those found in Alberta, have become some of the most dominant contributors to Canadian soil pollution. A further example can be witnessed in Calgary, where a neighbourhood built on an old Imperial Oil refinery needed their soil replaced due to contamination.[37]

Road salt pollution

As a result of Canada's icy winters, salt is needed in order to deice slippery roads. The primary ingredient of road salt is sodium chloride.[38] Road salt, while helping cars and people to gain traction in the winter, can have serious consequences for soil. As National Geographic found, "Road salt can pollute soil at every stage in the deicing process."[38] This pollution is a result of numerous factors such as runoff, application and spray from vehicles.[38] In Canada, there has been research that shows that "salt run-off from roads can increase local chloride levels to between 100 and 4,000 times normal levels."[39] Salt can have adverse effects on soil and soil composition. Significant levels of chloride (one of the main components in salt) can "alter the soil ‘s pH chemistry and elevate levels of heavy metal pollutants, while at the same time causing a loss of soil structure and killing off micro-organisms".[39] These effects can have dire consequences for plants rendering them unable to grow or stunting their growth.[39]

PCB pollution

Salt and oil refineries are not the only contaminants of soil. Polychlorinated biphenyls or PCBs also pollute the soil. PCBs are released into the environment through "spills, leaks from electrical and other equipment, and improper disposal and storage".[40] However, recently it was found that household weeds were able to remove PCBs from contaminated soil. A study found that "the weeds stored PCBs in their shoots and could be harvested for disposal cutting the need to expensively remove and incinerate contaminated soil".[41]

Health effects of pollution

Pollution is associated with numerous negative health effects in humans.

Air pollution

Air pollution has been shown to negatively effect humans' cardiovascular and respiratory systems.[42] Lung tissue can be damaged with direct exposure to air pollutants such as ozone, potentially causing lung inflammation and impairment of lung function.[42] As Environment Canada mentions "impacts from exposure can range from "minor breathing problems to premature death".[43] Some of the main respiratory diseases caused by air pollution include asthma, chronic obstructive pulmonary disease, and lung cancer.[44] Specific cardiovascular disease and problems caused by air pollution include heart attack, hypertension, inflammation around the heart, stroke and arrhythmias.[45]

Health Canada estimates that 5,900 Canadians die every year from air pollution.[46] A 2008 study by the Canadian Medical Association estimated that almost 3,000 Canadians die annually from short-term exposure to air pollution, while another 18,000 die annually due to long-term effects of polluted air. The study estimated the economic impact of air pollution to be at $8 billion, including lost productivity, health care costs, deaths and a decrease in quality of life.[47]

Water pollution

Contaminated water can result in a myriad of serious consequences for human health.

Additives used to clean drinking water may cause themselves harm. Chlorine, widely used in Canadian drinking water, is a prominent example. Through drinking water treated by chlorine over a long period of time, the risk of certain cancers, such as bladder and colon, increase.[48] Additionally, pregnant women who drink significant amounts of tap water have an increased risk of miscarriage.[48]

Drinking polluted water can also result in E. coli (as found in the 2000 outbreak in Walkerton), Giardia, or Cryptosporidium.[49][50]

Soil pollution

Soil pollution also causes numerous diseases. Some of the most prominent are cancer, kidney disease, liver disease, dysentery, skin infections, and stomach infections.[51]

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See also

References
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  2. "Canada Pollutes More Than Its Share". Enviromation (37): 258–259. 2006.
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