By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry program in Las Vegas luxury jets are drawing buyers with their smooth shapes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are keen to display unique types of aviation fuel considered less damaging to the climate, from utilized cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airline companies, have actually bowed to environmental pressure on air travel and committed to halving carbon emissions by 2050 compared to 2005.

Their hope is that embracing eco-friendly fuel to curb emissions might make organization jets more appealing to environmentally conscious purchasers - specifically corporations facing questions over sustainability from investors or green campaign groups.

The availability of less contaminating private jets could also spare the abundant and famous the negative promotion experienced by Britain's Prince Harry and his spouse Meghan over a current private jet trip to southern France.

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

The current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, primary business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions internationally, however can emit, usually, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter company Victor.

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

But planemakers state events such as the furore over his itinerary have actually included fresh challenges for a market currently aiming to justify its contribution to cutting business costs.

"Incidents of flight shaming involving making use of private jets are unfortunate when you consider that our market has provided fuel efficiency improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some experts remain doubtful that biojetfuels, typically mixed 50-50 with kerosene, will make a significant influence on public understandings about luxury travel.

"No quantity of Jatropha or Brazil-nut fuel can make business jets look eco-friendly," stated air travel expert Richard Aboulafia.

Demand from business jet operators for eco-friendly fuels now far goes beyond supply and their interest might drive future production, Sherbacow stated.

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

Corporate charter companies and experts are likewise seeing more interest from consumers who desire to buy carbon credits to offset emissions from their .

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a function in a corporate jet usage research study his business recently finished for a Fortune 500 business.

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