Russia has announced that some of the units deployed near the border with Ukraine are heading back to their bases. But some are sceptical that the threat has diminished. We hear from the BBC's Olga Ivshina.

Earlier this month, after years of delay, a deal was signed by the French energy giant Total Energies giving the green light to a controversial pipeline running from Uganda to Tanzania. The project's backers say it will usher in economic development across the region, but activists question the environmental impact of the project, as the BBC's Joshua Thorpe has been finding out.

A new study has found that a quarter of the world's rivers contain potentially toxic levels of pharmaceutical drugs. We get details from Dr Veronica Edmonds Brown, an aquatic ecologist at The University of Hertfordshire.

And Belgium has announced that under new proposed laws, workers will soon be able to choose a four day week. So will other countries follow their lead and does a four day week actually mean that employees work fewer hours? We speak to Joe Ryle, of the 4 Day Week campaign.