How to get around the new restrictions
Travel restrictions have been in place for the last few weeks across Europe, the US and Japan.
But they are being extended for the first time in years for people travelling to Canada.
The restrictions apply to airlines that have been operating in Europe for years and that operate in a region with high air pollution, particularly in the south of Europe.
The changes affect flights between Europe and Canada, with the first round of restrictions to be imposed this week.
The Canadian Air Transport Security Authority says all planes departing from Montreal will be required to wear masks during takeoffs and landings, and for every passenger entering Canada, a mask must be worn.
All passengers and crew will also have to wear face masks when they board planes, but there are exemptions for people who are travelling to a doctor, or for people with special medical needs.
Travelers to the US, where air pollution is the main concern, are exempt from the new rules.
All travellers from the UK, Ireland, Denmark, Norway and Sweden will have to follow the new rule.
All flights from the US to the UK and Ireland will be affected, with no exceptions.
Air travel from the United Kingdom to the Netherlands will also be impacted, but not all flights will be impacted.
The new rules apply to all international flights originating in Canada and will apply to domestic flights originating from the EU and the United States.
Air travel to the United Arab Emirates will not be affected.
More information on the new regulations can be found on the CAA website.
Travel to the Middle East, including Jordan, will not have to comply with the restrictions, the agency said.
There will also not be any changes to the travel advisory for those travelling to Jordan, which has been in the same area as the US for many years.
Jordan has been a favourite destination for US travellers in recent years.
Travel advisories have been issued in the Middle Eastern region on a number of occasions in recent weeks.
This week, the airline said its flights to Saudi Arabia, the UAE, Bahrain and Qatar will not fly.
The agency says flights from Saudi Arabia will have a maximum of 60 minutes between stops, and that stops will be scheduled on an “as-needed” basis.
The restrictions are being implemented for a total of 12 months, but it says some flights will only be affected for a limited period of time.
The latest restrictions come as the World Health Organization is warning that air pollution in the region is worsening and could worsen by 2030.
WHO’s Dr Thomas Bagnell said in a statement that the “vast majority” of air pollution events are “precautionary”.
Dr Bagnel said the WHO “does not have a specific time frame for when to expect the health impacts from air pollution”.
The WHO says air pollution can have health effects including increased levels of inflammation and heart disease.
It has urged countries to implement measures to reduce their air pollution levels.
In a statement, the WHO said the air pollution that is causing the most damage to health and the environment is the harmful particle pollution.