West London's room2 is the world's first net-zero hometel. The brainchild of eco-driven founder Robert Godwin, the accommodation is on track to be 89 per cent more energy efficient than the average UK hotel. Highlights include solar panels, ground-source heat pumps and a rooftop terrace that's home to wildflowers and 75,000 bees. But it doesn't stop there. Interiors are just as green, with reclaimed terracotta-coloured tiled floors and exposed concrete slabs for ceilings. Bedrooms, meanwhile, feature hand-crafted furnishings by local artisans: think floor-length mirrors and statement wallpapers. We love the huge walk-in showers, which, while being cleverly designed to use 40 per cent less water than your shower at home, are no less powerful for it.

Hotel BOAT&CO serves as a great reminder not to judge a book by its cover. Despite its factory-like facade, this eco-oasis has been turning the heads of Amsterdam's cool kids since it first opened its doors back in 2019. Sitting pretty in the emerging Western Docklands area, the property weaved sustainable practices into its every aspect from the get-go, including a thermal energy storage system and construction materials that produce zero waste. Its water-facing rooms marry a contemporary design with inspiration taken from the 1950s - think upholstered furnishings and natural woods.

Typically, it's the newbie hotels that deliver the goods when it comes to sustainability, but not in the case of California's Two Bunch Palms. Born in 1940 and nestled on the outskirts of Joshua Tree National Park, this spa hotel underwent a major eco-refurb back in 2014, which saw the addition of a three-acre solar farm that saves 20-million gallons of water per year, a mindfulness camp that hosts chakra-balancing massages and revamped rooms decked out in organic earth-tone fabrics. Hungry? The hotel's farm-to-fork restaurant is on hand, serving up vibrant, seasonal dishes worth writing home about. Don't miss: Downtown Palm Springs is only a 25-minute drive away, offering myriad tempting shopping and dining options.

Sweden, famed for its seemingly endless greenery (22.5 million hectares of forest, to be precise), welcomed this 20-storey wooden skyscraper late last year. Brought to us by the forward-thinking architecture firm White Arkitekter, the Elite group's The Wood Hotel was actually the result of a competition that invited entrants to design a cutting-edge hotel for Skellefteå. Running on 100 per cent renewable energy and promising to offset some 9,000 tonnes of carbon, the timber-clad infrastructure is an example of what utilising natural resources could look like in the future. Inside, the decor mirrors the property's message of simplicity, with soft grey armchairs and matte black torchiere lamps. Come nightfall, settle in for a sauna or head to the rooftop terrace for a cocktail.

Go entirely off-grid at Kenya's Campi ya Kanzi. Flanked by Tsavo West National Park and the mighty Kilimanjaro, the accommodation is situated in the heart of the breathtaking Chyulu Hills, and is justifiably proud of its carbon-negative and zero-emission credentials. Truth be told, as much as the safari base's rooms - kitted out with four-poster beds and bamboo coffee tables - are spectacular, it's the 360-degree views that we're most excited about. Don't be surprised if a giraffe or hippo wanders past your window during your stay. Animal lover? Head to the camp's website and check out the live wilderness cam.

Okay, so this place doesn't open until 2023, but it would be rude not to get a countdown underway for the world's first energy-positive (producing more energy than it consumes) hotel. Situated in the Norwegian Arctic Circle, Svart will stand on wooden piles on the waters of the Holandsfjorden fjord, at the foot of the Svartisen glacier. Promising to be much more than just a place to bed down, the hotel is set to flaunt a farm-to-table restaurant, an indoor-outdoor wellness hub and a sound-healing studio. Other activities on offer include ice climbing, fishing and foraging, plus yoga classes beneath the starry sky.

The grandfather of the natural world, aka David Attenborough, once referred to Lord Howe Island as "a setting so extraordinary it's almost unbelievable". We couldn't have said it better ourselves. Located on the western side of this petite paradise is Australia's first carbon-neutral hotel, Pinetrees Lodge. It would be an understatement to describe this place as high-achieving: it has played an integral part in the Sallywood Swamp Forest Restoration Project, protecting the surrounding critically endangered landscape. The set-up itself is an intimate affair, with 32 rooms framed by the island's famous turquoise lagoon. Dine on expertly prepared seafood at the Boatshed, a local gathering spot since the 1870s, while watching the blood-orange sunset put on its daily show.