80% of all global trade travels by sea, and the ship's carrying it account for 3% of global greenhouse gas emissions.

Now some shipping companies are taking a new tech as they try to navigate the industry to sustainability on the high seas.

It might look like an old school tall ship, but this vessel is charting a new course.

We always use the sail and only the sails.

I mean, we don't use the engine, even in really bad weather.

Jan Jordan is the captain of the high-tech cargo carrier, grain to sail too.

Last crossing, we did a maximum speed of 18 knots and average speed about 11 knots.

Its fastest crossing took just 15 days from New York to Saint-Malo on the

west coast of France. The only power? The wind. It's a new take on the clippers of yore,

fitted out with two giant carbon fiber masks, an aluminum hull and solar panels and hydrogenerators to power the ship's electronics.

Jacques Barreau founded the grain to sail with his twin brother Olivier.

They used profits from their chocolate and coffee business in France to build their first sail-powered cargo ship.

The position of the Grand Sail fleet is to be at minus 90% compared to the usual carbon footprint.

That's less than two grams of carbon emissions per ton per kilometer. By comparison, the most

efficient container ships on the sea today emit 10 to 40 grams of CO2.

An airplane emits as much as 800 grams per ton.

We want to not only reduce the carbon footprint, we want to kill it.

He acknowledges that it comes with a hefty price tag.

The cost of the transportation, when you want to be compatible with the environment,

it's more expensive, but that's the normal price is here.

When you are transporting goods with fuel, you don't pay the pollution, you don't pay the global warming.

It's free. So that's normal that it's almost, it's very cheap.

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