The One Planet Summit hopes to reignite discussions about protecting nature and people.
European leaders condemned an attack on democracy as chaos unfolded in a country they once relied upon for global leadership.
Their deaths on Saturday bring to five the number of French soldiers killed in operations in the West African country over the past week.
The French leader tested positive for COVID-19 seven days ago and was in self-isolation in La Lanterne, an official residence in Versailles.
The mission "marks France's condemnation of attempts to destabilise the country," the Elysée said.
Its candidacy for EU membership long-since rebuffed, Turkey appears more firmly set than ever on a path of assertive independence. Where it leads, will be a major issue in the year to come.
Trucks waiting to get out of Britain were parked up at a UK lorry park on Tuesday as France temporarily barred travel from the UK.