Climate Change, Pollution and Urbanization Threaten Water in Canada
A women fills a water bottle with a filter from an alpine lake in the mountains around Pemberton, British Columbia, Canada. Canada is on the front lines of rapid climate changes that affect the water cycle. Ben Girardi / Aurora Photos / Getty Images
By Corinne Schuster-Wallace, Robert Sandford and Stephanie Merrill
In recent years, the daily news has been flooded with stories of water woes from coast to coast to coast.
There are melting glaciers and ice sheets in northern and western Canada and lead in drinking water in the older neighborhoods of many cities in Canada. We see toxic blue green algae threatening pets, livestock and drinking water as well as catastrophic floods, droughts and fires.
In 2018, parts of British Columbia experienced devastating floods, followed by wildfires a couple of months later.
Our water resources are under threat from contamination, land use, urbanization and climate change. If we're not careful, it may not be clean enough or available when we need it.
An Opportunity to Lead
The public supports environmental — and water — leadership in Canada. Many political pundits have suggested the federal election result of October 2019 was a clear call for climate action.
And yet Canada is on the front lines of rapid climate changes that affect the water cycle. Where, when, and how much rain, snow or freezing rain falls is changing across Canada.
This is the water that we depend upon to replenish our groundwater, rivers and lakes, which continue to have a significant and increasing impact on water availability and quality in Canada and around the world.
However, Canadians remain divided on energy policy and resource development, and on appropriate solutions that balance environmental, economic and social needs. As Canadians, we must move beyond this and implement changes to better manage our water resources sustainably.
Water Front and Center
We must manage our water sustainably because water is central to environmental, social and economic sustainability and therefore sustainable societies. This is the focus of the UN's Sustainable Development Goals. These 17 goals identify targets that must be achieved for livelihoods, health, education, environment, cities, oceans, equity and partnership.
It's important to understand that these goals are not isolated, but interrelated. This is why, even though there is a goal for water (SDG 6), there are 40 targets in the other 16 goals that relate directly to water.
For example, we cannot have good health if we do not have clean and accessible water, and children cannot go to school or adults to work, if they are not healthy. With water often at the heart of many social and economic inequities, it is critical to address water quantity, quality and access issues in order to meet all of the goals and to achieve the global sustainable development vision.
The recipe for managing Canada's water resources in a sustainable and equitable manner requires all of us to urgently recognize our changing climate and water resources, including drinking water, and act appropriately.
It requires federal co-ordination and leadership on water to overcome challenges of fragmented jurisdiction, such as following through with their commitment to create a Canada Water Agency, develop a national flood forecasting system and ensure universal access to adequate drinking water supplies.
Research institutions must also step up to advance our knowledge, develop and assess decision support tools and solutions, and communicate their findings to communities, governments and economic sectors.
Finally, it requires reconciliation through shared nations' governance of water resources and recognition of the long history of successful, sustainable management of natural resources through indigenous knowledge and historical local knowledge.
Getting Our Own House in Order
Canada could support the world in achieving water sustainability, but it must first get its own house in order and achieve the UN's water goals nationally.
Canada's water opportunities and challenges. Global Water Futures
Canada still has not reached universal access to reliable, potable water supplies for everyone, especially First Nations communities. Lead pipes, disinfection byproducts and aging infrastructure are interrupting drinking water service and negatively affecting human health.
The Bottom Line
Canada already has the expertise, technologies, industries and research capacity to make good on a commitment to water sustainability and universal achievement of the UN's water goals for all Canadians. But it needs leadership to advance research and practice to expand our existing strengths, and export these internationally.
Canadian research institutions have a role to play in bringing the country together by showing Canada and the world the solutions and benefits of achieving these goals.
There are significant long-term benefits at stake, including the enhanced health and well-being of current and future generations, as well as expanded economic opportunity. But, to achieve these, political leadership needs to transcend partisan lines in order to do what is right.
Ultimately, we have an opportunity to make where we live a better place and to get our own watersheds in order. This will help us create a better, more just, equitable and sustainable world for all. The alternative is, quite simply, unthinkable.
Corinne Schuster-Wallace is an associate professor in the Department of Geography and Planning at the University of Saskatchewan.
Robert Sandford is the Chair in Water and Climate Security at United Nations University.
Stephanie Merrill is a research scientist in knowledge mobilization at the Global Institute for Water Security, Global Water Futures Program, University of Saskatchewan.
Disclosure statement: Corinne Schuster-Wallace receives funding from Global Water Futures and the Canadian Tri-Agency. She is co-chair of the Working Group on Climate Change for the Canadian Coalition for Global Health Research.
Robert Sandford receives partial funding from the Global Water Futures program at the University of Saskatchewan.
Stephanie Merrill is a volunteer board member of the Saskatchewan branch and National board of the Canadian Water Resources Association and the Nashwaak Watershed Association.
Reposted with permission from The Conversation.
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Where Does the Deficiency Begin?<p>Nobody knows exactly how much vitamin D a person actually needs. The question of when a deficiency starts is correspondingly controversial. However, vitamin D is becoming increasingly popular.Not only is the pseudo-scientific literature on the "sun vitamin" experiencing an upswing, but the number of published studies has also increased enormously in recent years. For example, in 2019 <a href="https://academic.oup.com/edrv/article/40/4/1109/5126915" target="_blank">a study found that</a> Vitamin D is responsible for keeping the skeleton functional and is associated with cardiovascular diseases, type 2 diabetes and various types of cancer. <br></p>
An All-Rounder<p>Vitamin D levels in the body rise and fall according to sun exposure. If sufficient UV rays reach the skin, the body is able to produce the vitamin itself. However, the human body only derives an estimated 10 to 20 percent of its daily requirement from food.</p><p>The vitamin D that we synthesize from sunlight or food is not biologically active at first. Before the kidneys can produce the biologically active form of the vitamin, known as calcitriol, and release it into the blood, some metabolic processes must take place beforehand.</p><p>In addition, many organs have receptors to which the precursor of calcitriol binds. Further, this substance is also present in blood.</p><p>From this precursor, the organs then produce calcitriol themselves, which the body then uses for countless other processes in the body. This form of vitamin D thus regulates insulin secretion, inhibits tumor growth, and promotes the formation of red blood cells as well as the survival and activity of macrophages, which are important for the <a href="https://www.mdpi.com/2072-6643/5/7/2502/htm" target="_blank">immune system.</a></p>
Low Vitamin D, Severe COVID-19 Disease?<p>A research study carried out <a href="https://www.sciencedirect.com/science/article/pii/S2352364620300067?via%3Dihub" target="_blank">at the University of Hohenheim</a> has now established a link between vitamin D deficiency, certain previous diseases, and severe cases of COVID-19.</p><p>According to the study, "there is a lot of evidence that several non-communicable diseases (high blood pressure, diabetes, cardiovascular diseases, metabolic syndrome) are associated with low vitamin D plasma levels. These comorbidities, together with the often accompanying vitamin D deficiency, increase the risk of severe COVID-19 events."</p><p>"This statement is completely correct," said Martin Fassnacht, head of endocrinology at the University Hospital of Würzburg. However, he qualifies that it is a pure association, "i.e. a mere observation that these events occur together.</p><p>Dr. Fassnacht is very critical of the hype surrounding vitamin D, but not because he denies the vitamin serves important functions. However, studies on humans have not been able to show that vitamin D has the healing powers many often propagate.</p><p>Fassnacht says, "If you take a closer look, the hopes that the administration of vitamin D has a healing effect have not been confirmed so far."</p>
Association Versus Intervention Studies<p>Many studies on the vitamin are association or observational studies. "By definition, these studies cannot prove the causal relationship, but only point to mere correlations," said Fassnacht. The physician tries to illustrate this with an example:</p><p>"Imagine two groups of 80-year-olds. One group is spry, active and does sports. If you compare them with another group living in nursing homes, the difference in vitamin D levels will be dramatic. Life expectancy would also be extremely different."</p><p>But to try to explain the difference in fitness by vitamin D status alone is far too simplistic. "Vitamin D levels are a good measure of how sick someone is. But not more," says Fassnacht. </p><p>According to Fassnacht, none of the intervention studies carried out to date -- that specifically examined the effect of vitamin D on various diseases -- has been able to confirm the previous association and laboratory studies or the presumed positive effect of vitamin D.</p>
Further Research Is Needed<p>"If a coronavirus infection is suspected, it is therefore absolutely necessary to check the vitamin D status and quickly correct any possible deficit," said the recommendation of the paper published by the University of Hohenheim.</p><p>"Studies are underway to see whether vitamin D helps in COVID-19 infection, but I personally do not believe that this is really the case," says endocrinologist Fassnacht. Nevertheless, he says it is of course useful to carry out these studies.<br></p><p>"I don't want to rule out that there are actually subgroups of people who benefit from an additional vitamin D dose," he says. After all, this has been proven to be the case with a severe deficit.</p><p>In view of the study situation, Fassnacht does not think much of preventive, nationwide vitamin D substitutes. "My belief that the vitamin helps somewhere is very low. But, of course, I can be wrong."</p>
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