Cancellation of a massive Canadian oil sands project leaves Prime Minister Justin Trudeau and a fierce critic, Alberta Premier Jason Kenney, with the challenge of overcoming their differences to square economic growth with environmental concerns.
Many Arab and African countries are struggling with rising populations. But in Egypt the pressures are acute, because 97% of its people live on just 8% of its territory, crowded along the Nile.
The European Commission sought to boost the flow of private money to tackle climate change on Tuesday by publishing guidelines on what qualifies as environmentally friendly investment, in a move welcomed by the financial industry.
Through the long summer months in India's capital, tens of thousands of people have cut back on daily showers and laundry because of a shortage of water that has led to fighting in some areas in which three people have been killed.
President Donald Trump said on Wednesday his primary concern with the Paris climate accord was that it treated the United States unfairly and that if a better deal could be reached, Washington might be persuaded to rejoin the agreement.
