By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas high-end jets are tempting buyers with their streamlined silhouettes, plush cabins - and significantly, their usage of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel kinds of aviation fuel considered less hazardous to the climate, from used cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, have actually bowed to ecological pressure on air travel and committed to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to suppress emissions might make company jets more appealing to ecologically conscious purchasers - particularly corporations facing questions over sustainability from investors or green campaign groups.

The accessibility of less polluting personal jets could also spare the abundant and popular the negative publicity experienced by Britain's Prince Harry and his better half Meghan over a current personal jet trip to southern France.

Five Gulfstream jets on screen in Las Vegas are utilizing 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 industry," stated Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

Some of the other 79 airplane on screen are anticipated to be powered by 150,000 gallons of other renewable fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions internationally, however can produce, on average, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has defended his periodic use of personal jets to guarantee his household's safety, and has stated that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his travel plan have actually included for a market currently aiming to validate its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of private jets are regrettable when you think about that our market has actually delivered fuel effectiveness enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will help the industry make inroads with corporations and rich purchasers. According to industry data, billionaires just have a 19% company jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane flies on eco-friendly fuels" and organisers including alternative fuel pumps for checking out planes - is not likely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some experts remain doubtful that biojetfuels, typically blended 50-50 with kerosene, will make a significant effect on public understandings about high-end travel.

"No amount of jatropha curcas or Brazil-nut fuel can make company jets look eco-friendly," said air travel analyst Richard Aboulafia.

Demand from business jet operators for sustainable 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 expand production up to 150 million gallons by 2022.

Corporate charter companies and consultants are also seeing more interest from clients who wish to purchase carbon credits to offset emissions from their flights.

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

"At the end of the day, I believe that cost, expense per hour, range, speed and performance, that's still the (sales) driver. But I think individuals are becoming more knowledgeable about the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)