The world’s greenest airlines have been named at the ITB Berlin travel show, with European carrier Monarch topping the list.

The study of airline efficiency was conducted by Atmosfair, a carbon offsetting company, and looked into factors such as how efficient an airline’s fleet was and how full its planes normally fly.

Monarch, a charter and scheduled airline operating predominantly from the UK, was judged the world’s most efficient airline, with Atmosfair praising its efficient aircraft and high seating density.

Luxury automaker Rolls-Royce is planning an electric limousine, which would be rechargeable…with zero emissions, the dailymail reports.

There has been speculation for two years that Rolls-Royce was planning a top secret electric model.

Then, before Christmas, Rolls-Royce’s chief executive said an electric or alternatively-fuelled ‘experimental’ Rolls-Royce model would be a ‘good idea’.

Today’s buses have a reputation for being large, slow and — even when powered by electricity — rather inefficient.

However, this could all be about to change thanks to a pioneering design from a Dutch scientist which was shown last week in Amsterdam.

The “Superbus” is the work of the Delft University of Technology and Prof. Dr. Wubbo J Ockels, a Dutch physicist and astronaut, to provide a realistic alternative to cars.

Lamborghini is to introduce a greener supercar that will replace the iconic Murciélago, which has been Lamborghini’s flagship for over a decade.

Automotive News reports that the supercar’s replacement will slash carbon dioxide output by 20 percent, without sacrificing performance.

It will feature a 6.5 liter, 700-hp engine and will emit 398 g/km of carbon dioxide, down from 495 g/km in the old version.

Luxury yachts that whisk their millionaire owners or charter guests to the world’s top beauty spots, guzzling gallons of fuel on the way, have long scraped the bottom of the green league tables.

But as superyachts converged on the Riviera for this year’s 20th Monaco Yacht Show, a small but determined minority were flying the green flag as the ever expanding fleet of mega yachts seeks to reduce its carbon footprint.

Paolo Moretti, who heads the yachting division of Italy’s ship certification body RINA, told AFP interest in environmental topics has spiked in the yachting sector over the last five years.

“Luxury yachts have big budgets but owners now not only want to excel in terms of comfort and luxury but also in environmental sustainability,” he said.

Many hotels promise to be green nowadays, but where can travelers find more information to help them choose the most eco-friendly hotel?

Online booking site Travelocity believes that travelers actually prefer green hotels. According to its statistics, eco-friendly properties get higher reviews than their non-green counterparts.

For many consumers, search sites such as Travelocity, Expedia and Orbitz will be the first stop in booking a hotel and all three have tried to make it easier.