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“What Carter’s story tells me is that we are woefully unprepared for the health impacts of climate change as a society and in the health-care system," Lem told ¹ú²úÓÕ»ó¸£Àû.

"It's a moral imperative for governments to end our dependence on fossil fuels before more kids like Carter die," she said.

Burning fossil fuels leads to climate change, which in turn can trigger wildfires, as well as create other air pollution, Lem said.

Carter's aunt, Anamaria Vigh, said on Facebook that the boy from 100 Mile House, B.C., died from asthma last week in hospital.

On Monday, the B.C. Coroner's office posted a public safety bulletin confirming it is investigating Carter's death.

"The sudden and unexpected death of this young boy is a heartbreaking loss for his family and community," the bulletin said.

"As the province experiences greater impacts from the effects of climate change, British Columbians are learning more about the risks associated with wildfire smoke, extreme heat and other environmental factors. This greater awareness can help us respond when risks are identified," it said.

Whenever wildfire smoke starts appearing, Lem — who is also a family doctor in Vancouver — sees a rise in patients suffering from asthma and sore throats.

More severe asthma attacks, as well as other respiratory diseases and heart problems, end up in the emergency department, she said.

The B.C. Coroner's bulletin also said that smoke from wildfires is especially dangerous for children, older people and those with pre-existing heart and lung conditions.

There are some precautions that people can take to minimize their exposure to wildfire smoke, the bulletin said, including staying inside with windows closed and using "high-quality portable air cleaners with HEPA filtration to remove smoke particles from indoor air."

The coroner's office also recommended keeping windows closed and air conditioning on in cars, as well as taking refuge in "places with controlled air supply," including shopping malls or public libraries.

Lem said Carter's death is "every parent's and every doctor's worst nightmare."

“We have to sprint as fast as we can to both adapt to the effects of climate change (by) protecting people from the effects of wildfire, smoke and heat," she said.

"At the same time, (we have to) sprint to mitigate climate change by reducing our use of and expansion of fossil fuels as quickly as we can."

This report by ¹ú²úÓÕ»ó¸£Àû was first published July 18, 2023.

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