The smokes have reportedly put around 75 million people under air quality alerts.

Scientists at the Climate and Environmental Research Institute in Norway (NILU) have been able to detect the increase in smoke using very sensitive instruments and then confirm its origin using forecast modeling, reports CNN.

People in Norway may be able to smell and even notice the smoke as a light haze but, unlike parts of the US that have seen hazardous pollution, they should experience no health impacts, said Nikolaos Evangeliou, a senior scientist at NILU.

“The fires traveling from such long distances arrive very diluted,” he told CNN.

Over the coming days, the plume is expected to spread across swaths of Europe but it’s unlikely people will be able to smell or notice the smoke, Evangeliou said.

“Smoke from wildfires such as those in Canada is injected at high altitudes thus staying in the atmosphere longer and able to travel over far distances,” he said.