Startups show off ocean-preserving tech at Paris trade fair

Harnessing ocean currents to boost fuel efficiency of vessels, or tracking whales using sensor data and AI -- startups at Paris trade fair Vivatech have been showing off the latest innovations aimed at protecting the environment.

"We have to use AI because in the natural world there are too many variables" to deal with manually, said Emily Charry Tissier, a biologist and founder of Canadian startup Whale Seeker, which is developing technology to track sea mammals.