Four years ago nearly every government on Earth agreed to protect nature. Now, as countries gather for Cop17, the pressure is on to follow through on those commitments

• Cop17 at a glance: everything you need to know about the UN’s nature summit

Passersby could smell the dead fish before they saw them. In August, more than 3,000 pike, roach, carp and rudd were found lifeless along the River Wensum in Norwich. Some gasped for air in their final moments, desperate for the oxygen that heatwave conditions had depleted in the water. Investigators believe that the die-off was triggered by heavy rainfall that flushed through high concentrations of pollution at a time when wildlife were already struggling.

The 45-mile (70km) chalk river is one of about 250 in the country. They are a geological accident almost unique to Britain – and one of Earth’s rarest habitats. They emerge from chalk aquifers and are home to species such as freshwater shrimp, otters and stoneflies, also providing drinking water for millions of people. But just 11 have formal protection, with many ravaged by sewage pollution and overextraction. The Norfolk river is one of the few that does have legal protection, but it is in poor ecological health.

When we can’t even afford to rent or buy somewhere to live, we have to ask: did we give the financial sector too much power?

• Leilani Farha is the former UN special rapporteur on adequate housing

In the summer of 2021, I visited a homeless community in a park in Toronto, Canada, and spoke to one of the residents. He was living in a tent in the shadow of brand new skyscrapers, and had been homeless for about five years. At one point he swivelled around, pointed up at a crane on the skyline, and said: “Who are they building those for? Definitely not for me.”

He was right. And he captured something experienced by ordinary people around the world: the growing conviction that the housing system is no longer tethered to their needs. What he was pointing at is not just a housing crisis. It is a crisis of democracy.

Leilani Farha is the 2026 CBC Massey lecturer. This piece is based on her new book: Housing Inc.: A Global Takeover and Our Fight for Home. She is the former UN special rapporteur on adequate housing and the global director of the international human rights organisation, The Shift

From rent strikes to squatting, a new show reveals how people have managed to keep a roof over their head in London – and the mould and astronomical rents that persist

Charles Booth’s pioneering poverty maps of Victorian London show a vivid colour-coded warren of streets, alleyways and slums tightly packed together. Those marked black and dark blue were classed as being “very poor”, defined by “chronic want”. The light blue ones were poor – “18s to 21s a week for a moderate family”. Pink streets housed those who were “fairly comfortable”, and those where the wealthy lived were marked in yellow.

The maps by the British social reformer are the 19th-century equivalent of the modern-day indices of deprivation, which rank every geographic area of the UK by its level of social and economic disadvantage. Comparing the two shows how much has changed in the past 150 years – but also what hasn’t. Historical slums have been cleared away and housing conditions have generally improved, but extreme poverty and extreme wealth continue to live side by side in the capital.

I’d become obsessed with appealing to my invisible audience. But since I ditched the app a year ago, my quieter moments have taken on brilliant new meaning

I first downloaded Instagram when I was 17 and became hooked on it the way most people fall in love: slowly, and then all at once. For a long time, I never considered myself a social media addict. I self-righteously refused to download TikTok, declared Snapchat to be for “children”, and posted less regularly on Instagram than half of the people I followed.

As I went through my university years, however, certain changes crept up on me. I began to swap reading – or essay-writing – for hours spent curating new posts. On my way home from lectures (or later, from my work as a journalist), I would spend ages trying to take the artsiest, most perfect picture of that evening’s sunset for my story – as if the people who followed me were eagerly awaiting yet another photo of one of the Earth’s rotations. What usually followed was a night of reloading my feed to see how many people had reacted to my post – or worse, hadn’t reacted at all.

Florian Wirtz takes on more responsibility in Liverpool’s attack while Pierre Sage is under pressure at Crystal Palace

Dominic Calvert-Lewin’s physicality overpowering Bryan Mbeumo in Manchester United’s area at a corner grabbed him a fifth goal in 10 outings for Leeds: a pretty respectable ratio. “I just tried to cause a ruckus,” said Leeds’ No 9. “I make it difficult for the defender. I read the flight of the ball and was quickest to react. I feel really comfortable [here]. I feel the support from the club and the fans and it is a great feeling stepping on to the pitch, particularly at Elland Road.” Of the contenders to be understudy to Harry Kane as England’s centre-forward, Calvert-Lewin may be the lead act – if he can stay injury-free, which has been a difficulty throughout his career. Jamie Jackson

Match report: Leeds 1-1 Manchester United

Match report: Brentford 1-2 Liverpool

Match report: Manchester City 3-2 Ipswich

American journalist Evan Gershkovich talks about his arrest by the Russian intelligence services in 2023, his 16-month detention, and the swap deal that eventually took him home. Get in touch at tif.questions@theguardian.com

Evan Gershkovich was in an American-style steakhouse – with fake deer heads on the walls – talking to a contact in an eastern Russian city when masked agents of the Russian intelligence service burst in. ‘It was a trap from the start,’ he says. The American journalist who was working for the Wall Street Journal was detained, beaten and charged with espionage.

Evan talks to Annie Kelly about his arrest, what happened during his detention in a high-security jail, and the swap deal that finally took him home.

Forces in cities including Paris and Lyon were overwhelmed after ‘lack of anticipation’, says Laurent Nuñez

• Europe live – latest updates

France’s interior minister has conceded police “lost control” in some cities during violent protests at the weekend, as the country’s president, Emmanuel Macron, demanded a full security review and “new operational methods” to end the rioting and looting.

Laurent Nuñez said on Monday there had been a “lack of anticipation” in preparations for Saturday’s protests and acknowledged that police numbers had sometimes been inadequate to deal with rioters and looters on the fringes of the demonstrations.

Ukrainian president accuses Washington of ‘denial of reality’ in ongoing row with Trump over apparent support for Moscow

Ukraine did not receive a warning from the US about an impending Russian missile attack on Sunday evening, Volodymyr Zelenskyy has said, reviving concerns that Washington is withholding intelligence in order to bully Kyiv into capitulating to Moscow.

Yuri Ihnat, a spokesperson for the Ukrainian Air Force, said on television on Monday morning that Ukraine had not received a warning before a Russian missile barrage hit power plants in Kyiv at around 11pm. Earlier, a Ukrainian government official had told the Guardian the US had not warned the capital about the impending missile strike.

Two-thirds of population face crisis levels of food insecurity and 200,000 people are in danger of famine

This winter is likely to deepen hunger for Palestinians in Gaza, after sweeping aid cuts forced the UN’s World Food Programme (WFP) to end support for more than half a million people each month, the agency’s director for Palestine said.

More than a year after a Trump-brokered ceasefire came into force, promised reconstruction has not begun, there are few jobs and the vast majority in Gaza still rely on aid to eat.

Officer in stable condition after incident in city centre in early hours of Sunday

Four people have been arrested after a police officer was shot in the foot in Nottingham city centre.

The officer was struck by a projectile believed to have been fired from a shotgun after approaching two suspects in the early hours of Sunday morning.