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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Police: Parade gunman bought 5 weapons despite threats

The gunman who attacked an Independence Day parade in suburban Chicago, killing at least seven people, legally bought two high-powered rifles and three other weapons despite authorities being called to his home twice in 2019 after he threatened suicide and violence, police said Tuesday.

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