By Allison Lampert

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

Fuel manufacturers and jetmakers are keen to display novel forms of air travel fuel considered less harmful to the climate, from utilized cooking oil to the clearly less attractive meat waste.

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

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

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

Five Gulfstream jets on display 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 byproducts of the food industry," said Bryan Sherbacow, primary business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions worldwide, but can emit, typically, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

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

But planemakers say events such as the furore over his travel plan have included fresh obstacles for an industry already aiming to validate its contribution to cutting business costs.

"Incidents of flight shaming involving making use of private jets are regrettable when you think about that our industry has provided fuel performance improvements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will assist the market make inroads with corporations and rich buyers. According to industry data, billionaires only have a 19% business jet ownership rate.

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

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

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

Demand from company jet operators for renewable fuels now far surpasses supply and their interest might drive future production, Sherbacow said.

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

Corporate charter business and specialists are also seeing more interest from customers who wish 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 corporate jet utilization research study his company just recently completed for a Fortune 500 business.

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