By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry program in Las Vegas high-end jets are enticing buyers with their sleek shapes, plush cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are keen to display novel types of aviation fuel deemed less harmful to the environment, from used cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, have acquiesced environmental pressure on air travel and dedicated to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that adopting renewable fuel to curb emissions might make business jets more attractive to environmentally conscious purchasers - particularly corporations facing questions over sustainability from investors or green project groups.

The schedule of less polluting personal jets might also spare the rich and well-known the negative publicity experienced by Britain's Prince Harry and his wife Meghan over a recent private jet trip to southern France.

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

The latest waste-based fuels include "fats, grease and oils that are byproducts of the food market," 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 display screen are expected to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of overall yearly carbon emissions internationally, however can discharge, typically, up to 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has actually protected his occasional usage of personal jets to guarantee his family's safety, and has actually stated that on the unusual events he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his itinerary have included fresh obstacles for an industry currently making every effort to validate its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of private jets are unfortunate when you think about 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 usage will assist the industry make inroads with corporations and rich purchasers. According to market data, billionaires only have a 19% business jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers adding alternative fuel pumps for checking out aircrafts - is unlikely to satisfy all critics at the Oct 22-24 high-end jet occasion.

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

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

Demand from company 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, could broaden production up to 150 million gallons by 2022.

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

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

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