The eco-conscious adventurers trying to circumnavigate the world in a carbon-neutral biodiesel trimaran are approaching Puerto Rico, where they’ll take on more fuel, fix the toilet and repair an inspection hatch that flooded their sleeping quarters with biodiesel.

Despite the problems, Earthrace has covered 4,200 miles since leaving Sagunto, Spain, on April 27. The team is making its second attempt to circumnavigate the globe in record time and has braved 18-foot seas since leaving the Azores last week.

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