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By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market show in Las Vegas high-end jets are tempting buyers with their streamlined shapes, luxurious cabins - and significantly, their use of .

Fuel producers and jetmakers are eager to showcase unique forms of air travel fuel deemed less damaging to the environment, from utilized cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, have actually acquiesced ecological pressure on aviation and devoted to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that embracing sustainable fuel to curb emissions might make organization jets more appealing to environmentally mindful purchasers - particularly corporations facing concerns over sustainability from investors or green project groups.

The availability of less polluting personal jets might likewise spare the rich and well-known the negative promotion experienced by Britain's Prince Harry and his spouse Meghan over a recent personal jet trip to southern France.

Five Gulfstream jets on screen in Las Vegas are using California-produced fuel from inedible beef tallow.

The most recent waste-based fuels include "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, chief industrial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

A few of the other 79 aircraft on display are expected to be powered by 150,000 gallons of other renewable fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon emissions internationally, however can give off, typically, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has actually safeguarded his occasional usage of private jets to ensure his household's security, and has actually said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state incidents such as the furore over his schedule have actually added fresh difficulties for an industry already aiming to justify its contribution to cutting business costs.

"Incidents of flight shaming including using personal jets are unfortunate when you think about that our industry has delivered fuel efficiency improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will help the market make inroads with corporations and wealthy buyers. According to industry data, billionaires only have a 19% company jet ownership rate.

But even an image makeover - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers adding alternative fuel pumps for checking out airplanes - is not likely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some experts stay skeptical that biojetfuels, typically blended 50-50 with kerosene, will make a substantial influence on public understandings about luxury travel.

"No amount of Jatropha or Brazil-nut fuel can make service jets look eco-friendly," said air travel expert Richard Aboulafia.

Demand from service jet operators for sustainable fuels now far exceeds supply and their interest could drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of biofuel at its California plant, could broaden production up to 150 million gallons by 2022.

Corporate charter companies and specialists are also seeing more interest from consumers who wish to buy carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions contributed in a business jet usage research study his business recently completed for a Fortune 500 company.

"At the end of the day, I think that cost, cost per hour, variety, speed and efficiency, that's still the (sales) chauffeur. But I believe individuals are ending up being more conscious of the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)