Key Points:

• MIT Technology Review ’s What’s Next series looks across industries, trends, and technologies to give you a first look at the future.
• You can read the rest of them here .
• In the early 2020s, a little-known aquaculture company in Portland, Maine, snagged more than $50 million by pitching a plan to harness nature to fight back against climate change.
• The company, Running Tide, said it could sink enough kelp to the seafloor to sequester a billion tons of carbon dioxide by this year, according to one of its early customers.