Papua New Guinea's capital has launched an initiative to plant a million trees each year.
To mark World Environment Day on Wednesday, the Port Moresby governor, Powes Parkop, planted the first 20 trees along the waterfront.
Mr Parkop said the climate crisis is already affecting PNG, and the city has to do its part to stop it.
He said if every city resident planted a tree, then the one million target would be met.
Mr Parkop also called for the government to do more, including looking into banning plastic bags and making World Environment Day a public holiday.