Meet the guy who wants to help save the planet with thousands of buoys, seaweed and giant antacids

Marty Odlin, the CEO of Running Tide, wants to absorb carbon dioxide from the air and sea with a network of kelp-growing buoys. (Evelio Contreras/CNN) Marty Odlin, the CEO of Running Tide, wants to absorb carbon dioxide from the air and sea with a network of kelp-growing buoys. (Evelio Contreras/CNN)

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Celebrations, protests take place on Canada Day in Ottawa

Thousands of people wearing red and white and waiving Canadian flags packed downtown Ottawa to celebrate Canada's 155th birthday on Friday, while groups of protesters popped up around Parliament Hill to protest COVID-19 vaccines and federal restrictions.

Wellington Street in front of Parliament Hill on Friday evening, as Canadians celebrated Canada's 155th birthday. (Jeremie Charron/CTV News Ottawa)

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