A man attends a climate change protest in Montreal on Saturday, Sept. 26, 2020. A report by the Canadian Institute for Climate Choices says climate change will add more than $100 billion to Canada’s health-care costs by mid-century. THE CANADIAN PRESS/Graham Hughes

A man attends a climate change protest in Montreal on Saturday, Sept. 26, 2020. A report by the Canadian Institute for Climate Choices says climate change will add more than $100 billion to Canada’s health-care costs by mid-century. THE CANADIAN PRESS/Graham Hughes

Climate change health costs to top $100B by mid-century: report

Canadian Institute for Climate Choices report considered air quality, diseases and temperatures

Climate change is likely to add more than $100 billion a year to Canada’s health-care costs by mid-century, says a report by a federally funded research group.

The Canadian Institute for Climate Choices says effects on health are likely to be heaviest among those who are already disadvantaged.

“Heat waves, air pollution — we see that those disproportionately impact people with certain health status and people who don’t have the same resources as the average Canadian,” said co-author Ryan Ness.

The report draws on some of the latest research to model how a less predictable climate with more extreme events could affect the health of Canadians. It looked at two cases: one in which little is done to curb greenhouse gas emissions and one in which global warming is kept under 2.5 degrees C.

Up until 2050, there is little difference between the two scenarios, Ness said.

The report considered air quality, new diseases and hotter temperatures.

“Those are all impacts we already know are happening. There is a clear connection to climate change and a good body of science on how people’s health outcomes relate to those stresses,” Ness said.

Air quality is the biggest factor.

Rising temperatures are linked with increased ground-level ozone, which helps create smog. Larger and more frequent wildfires also degrade air quality.

The report predicts the Canadian economy will lose $86 billion by 2050 due to illness and lost productivity due to those factors.

It also quotes research estimating that by mid-century, Ontario and Manitoba will experience about 75 days a year over the threshold at which heat-related deaths begin to occur. The report suggests hospitalizations due to hot weather will increase by at least 21 per cent.

Mental health is harder to quantify, said Ness.

“The effects of extreme weather on mental health and the subsequent economic and human toll is really not on the radar so far.”

But he points to research done after the Fort McMurray, Alta., wildfire — a blaze scientists say was made more possible by climate change — that showed significant increases in depression, anxiety and substance abuse. Depression already costs Canada $34 billion a year, the report says.

Other effects on mental health — impaired outdoor recreation, the loss of habitats Indigenous people depend on — can’t yet be quantified. That doesn’t mean they’re not important, Ness said.

“Those are things a dollar value can’t be put on but must be considered.”

All consequences are likely to be felt more on those less able to bear them, said Ness — the poor, the old, the otherwise disadvantaged.

“They don’t necessarily have a safe and cool place. They don’t necessarily have the same access to health care. They don’t necessarily have the same quality of baseline health.”

The report suggests that Canada’s readiness for changes to people’s well-being is failing. It says federal government funding to help adapt to climate change has earmarked $71 million, or just three per cent, to health.

That needs to change on both federal and provincial levels, suggested Ness. People need to start linking what’s happening in their environment and what’s happening with their health, he said.

“The average person in Canada is starting to recognize more and more that some of the changes that we’re seeing are connected to climate change. I think, though, that we’re not necessarily connecting all the dots.”

—Bob Weber, The Canadian Press

RELATED: Judge rejects 15 youths’ climate change lawsuit against Canadian government

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