The violence in Tigray has killed thousands of people and forced hundreds of thousands from their homes in the mountainous region of more than 5 million.
The ICAO has no power to impose sanctions. But European leaders this week agreed to cut air links with Belarus and told airlines to avoid the country's airspace.
The paper in the journal Environment International showed that 745,000 people died from stroke and heart disease associated with long working hours in 2016
Those promises centre on a "levelling up" agenda to bring economic opportunity to left-behind parts of the country, as Johnson exploits his vaccine-boosted popularity to make further inroads into opposition Labour party strongholds.
Cali, Colombia's third-biggest city and the worst affected by the ongoing unrest, has had soldiers patrolling its streets since last Friday on government orders.
The rights office called for calm on all sides ahead of a planned mass protest on Wednesday, and stressed that security forces should only use firearms as a last resort.