By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry program in Las Vegas high-end jets are drawing buyers with their sleek silhouettes, luxurious cabins - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are eager to kinds of aviation fuel deemed less harmful to the environment, from used cooking oil to the definitely less attractive meat waste.

Business jet operators, like airline companies, have bowed to ecological pressure on air travel and devoted to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to curb emissions could make service jets more appealing to environmentally mindful buyers - particularly corporations facing concerns over sustainability from shareholders or green campaign groups.

The availability of less contaminating private jets might likewise spare the rich and well-known the unfavorable promotion experienced by Britain's Prince Harry and his other half Meghan over a recent private jet journey to southern France.

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

The most recent waste-based fuels consist of "fats, grease and oils that are byproducts of the food industry," said Bryan Sherbacow, primary industrial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions globally, but can produce, usually, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

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

But planemakers state events such as the furore over his schedule have actually added fresh difficulties for an industry already striving to validate its contribution to cutting corporate expenses.

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

Bombardier believes increased sustainable fuel usage will help the industry make inroads with corporations and wealthy buyers. According to market information, billionaires only have a 19% organization jet ownership rate.

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

Environmentalists and some analysts remain skeptical that biojetfuels, normally blended 50-50 with kerosene, will make a significant effect on public understandings about luxury travel.

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

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

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

Corporate charter companies and consultants are also seeing more interest from consumers who desire to buy carbon credits to balance out emissions from their flights.

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

"At the end of the day, I think that price, cost per hour, range, speed and performance, that's still the (sales) motorist. But I think people are ending up being more familiar with the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)