Our guest warns of a devastating crisis in Cameroon's western Anglophone regions, where for five years the military has been fighting separatists who want to break away from the Francophone country. Education has been one of the main casualties, with separatists allegedly attacking thousands of teachers, students and parents as they enforce a boycott of schools. Meanwhile, Cameroon's military is accused of killing civilians, razing homes and burning down villages. Human Rights Watch is calling for a response that focuses on dialogue and crimes perpetrated by both sides. The NGO's senior researcher Ilaria Allegrozzi joined us for Perspective.

The violent conflict in Cameroon's Anglophone regions that has engulfed the country shows no signs of abating. Now into its fifth year, we look back at the start of the crisis.

A civil war has been raging in Cameroon since 2016. Separatists in Anglophone regions want their own state, called Ambazonia.

Spain's National Geological Institute said the volcano spewed blocks of molten lava "as large as three-story buildings." A partial cone collapse near the volcano's emission vent triggered the event.

Facebook is facing a historic crisis. Revelations by former data scientist-turned-whistleblower Frances Haugen have shed light inside the notoriously secretive tech giant. She says Facebook harms children, sparks division and undermines democracy in pursuit of astronomical profits. Her allegations are backed by the leak of tens of thousands of internal documents.

A team of Cameroonian engineers has developed smart incubators to stem the high neonatal death rates in their native country. This will allow parents and doctors to constantly monitor the health of premature babies at a distance.

Authorities in western Cameroon appealed for calm after a policeman killed a schoolgirl in the troubled region and was lynched by an angry mob.

Bild tabloid Editor-in-Chief Julian Reichelt was fired after The New York Times detailed misconduct toward female employees. The case is now making waves internationally.

Mount Aso volcano spews a giant column of ash thousands of metres into the sky, after the late-morning eruption in southwest Japan. The active volcano ejected hot gas and ash as high as 3,500 metres (11,500 feet), and sent stones tumbling down its grassy slopes.

The carmaker is striving to compete with Tesla by not using so much aluminium. BMW want half its new cars to be electric by 2023.

Facebook began this week by announcing more than $9 billion in quarterly profits, an increase of about 17 percent. The social media giant also announced that it now has close to three billion users. But all is not well on the Facebook front as Mark Zuckerberg’s platform has been facing a deluge of scathing reports.

In the far north of Cameroon, Nigerian refugees have been fighting desertification for the past four years. The desert advances by 12 percent every year in the region, which gets on average three times less rainfall than the rest of the country. But the UNHCR is hoping that its programme at the Minawao camp can help turn back the tide. More than 360,000 seedlings have already been grown in the nursery and planted over more than 100 hectares. Our correspondents report.