Wildfire smoke has pushed Canada to the top of a very bad chart. Compared to the U.S., Canada’s cities were much more polluted last year. Also: Renters find new ways to compete in the toughest rental housing markets. Plus: Adrienne Arsenault rides along in a medical evacuation flight taking Gazans to safety in Doha.

Tuesday's top stories, explained

Wrap your day with the world’s biggest stories. From the CBC News teams behind ‘The World at Six’ and ‘The World This Weekend’ comes a vibrant evening news program, updated seven days a week. Hosts Susan Bonner, Tom Harrington and Stephanie Skenderis sort out what's real, what's relevant and what’s truly new, from a Canadian perspective. We offer context, analysis and surprise — all in about 20 mins. We set the bar on the daily news catch-up, going deeper and further on news stories that speak to the moment.

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Pro-Palestinian protests on university campuses in Canada and the U.S. show no signs of letting up. Also, one school district in Moncton, New Brunswick is challenging the provincial government to court over its gender identity policy. Plus: As Canadians struggle with the high cost of food - the government is looking at bringing in more international grocery stores to create competition, and hopefully lower food costs. 

Campus protests, Gender policy court battle, bringing foreign grocers to Canada

RCMP have arrested members of an alleged hit squad for the murder of Sikh separatist Hardeep Singh Nijjar. Police say the accused are members of an Indian gang and could be connected to three other murders in Canada. Last fall, Prime Minister Justin Trudeau accused the Indian government of ordering Nijjar’s killing. Also: A public inquiry report says there was foreign interference in the last two federal elections, though not enough to affect who won. But the report warns: things are going to get worse. Plus: Lost and abandoned fishing gear is a huge environmental problem. Groups doing the cleanups say they will have to stop unless they get more money from Ottawa.

Arrests in the murder of Hardeep Singh Nijjar, foreign interference in elections, ghost gear

Confrontations on university campuses in the U.S. spark debates about the limits of reasonable protest. The president speaks out after crackdowns at several schools. Also: It’s a good news/bad news environment report. Canadian greenhouse gas emissions rose less than expected in 2022, but more work needs to be done. Plus: A former member of the International Olympic Committee's refugee team is trying to pay forward the kindness he received in Canada, by helping young athletes in Kitchener achieve their dreams.

Campus crackdown, emissions report,  IOC refugee team member pays it forward in Canada

Violent clashes in Los Angeles and a massive show of force by police in New York City, as a wave of pro-Palestinian demonstrations shows no sign of abating on university campuses in the U.S. and Canada. Plus: The Canadian Dental Care Plan kicks in today for seniors over 70. We break down what you need to know about the new program. Also: Heightened tensions between Hindus and Muslims as India votes in a month-long election. Prime minister Narendra Modi has been accused of stoking sectarian anger using anti-Muslim language.

Campus violence, Canadian dental care plan, Indian election tensions

An extraordinary day on Parliament Hill, for all the wrong reasons. MPs catcalled and shouted insults. Two were ordered out of the House – including opposition leader Pierre Poilievre. Plus: Pro-palestinian encampments at universities in Montreal and Vancouver show no signs of quieting. McGill asks for police help and a pair of students file for an injunction against the protestors. Also: As the United States struggles to contain a bird flu outbreak in dairy cows, scientists in Canada urge officials to get ahead of the virus now.

Tuesday's top stories, explained

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