Where else but Paris for the cutting edge of debate on food?
This time, though, not with the gourmet in mind, but the planet.
This beef burger's not, in fact, beef - but entirely made from plants.
The 'Impossible Burger' one way to hit targets for eating less meat.
And to generate around a quarter of the emissions cuts needed to keep global warming within 2 degrees.
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But even the most virtuous of vegetarians may still prefer chocolate.
That too a challenge.
Climate change expert, Diana Liverman: "So for example chocolate, which a lot of people absolutely love, we're really worried about that because a lot of the areas where they grow cocoa, the essential ingredient of chocolate, are very vulnerable to climate change we may not be able to grow cocoa there anymore."
Which could hit local farmers badly.
Some of the smallest amongst them demonstrating in the French capital.
They say the big food companies like Danone are responsible for huge greenhouse gas emissions.
Small-scale peasant agriculture is, they say, the future.
Developing nations may also need help to adjust - prompting US secretary of state John Kerry to announce a doubling of grant funding for just that - to around $860 million a year.
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"We are prepared to do our part and we will not leave the most vulnerable nations among us to quite literally weather the storm alone," Kerry said.
Thought for food here too as some French entrepreneurs offer a way of growing strawberries in town centres.
Saving on food miles - but not, they claim, on flavour.
