Hi, this is Varun from Singapore. Despite not living in the United States,

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slash donate. Could used cooking oil replace crude from American public media, this is Marketplace Tech.

I'm Lily Dramale. An estimated 80, 80,000 people have descended on Dubai for COP28.

This latest gathering focused on multilateral cooperation on climate change has record

attendance and a massive carbon footprint to match. Some world leaders and corporate executives flying there on private jets, we've been assured,

got there using sustainable aviation fuel, also known as SAFE.

Meanwhile, just last week, a Virgin Atlantic passenger jet traveled from London to New York,

powered 100% by Saf. It came from feed stock, including used cooking oil, waste animal fats, and what the company

called a small amount of synthetic aromatic kerosene. Critics call this a

gimmick and to be clear right now sustainable aviation fuel makes up just a tiny

slice of fuels that airlines use to fly us places but energy analyst Louise Burke of

the consultancy Argus media says that could change.

The big difference between sustainable aviation fuel and conventional jet fuel

is that there is a very specific difference in the amount of greenhouse gas emissions that are released into the atmosphere.

So these companies are essentially trying to reduce the GHG emissions.

The aviation sector in general is kind of one of the last remaining

industry sectors to really take a good look at this and see how they can they can

actually reduce their carbon emissions.

Which is a big problem for them, right?

...