Buses in Paris will start testing an environmentally friendly diesel
developed by the oil company Elf this autumn. The fuel contains 10 per cent
water and a secret additive to keep the water and diesel emulsified. Elf says
that the fuel cuts emissions of nitrogen oxides by a third and of microscopic
particles by a half.
More from New Scientist
Explore the latest news, articles and features

Life
New Scientist recommends a brilliant take on the evolution of birds
Culture

Environment
Striking photos show how sands are encroaching on oases in the Sahara
Regulars

Comment
Think you have a good sense of humour? So do most people…
Regulars

Comment
Sci-fi horror film Backrooms is a triumph for its 20-year-old director
Culture
Popular articles
Trending New Scientist articles
1
Fully autonomous drones have killed human soldiers for the first time
2
Millions of fossil whale bones found in deep-ocean ‘necropolis’
3
A nuclear war between India and Pakistan could destroy the ozone layer
4
Robots are about to overtake armed soldiers as the deciders of war
5
Mysterious ‘cold blob’ in the Atlantic suggests the AMOC is weakening
6
Understanding anorexia’s grip on the brain could unlock new therapies
7
Hundreds of new moons are revealing our solar system's violent history
8
The maths meme that has been distracting mathematicians for a century
9
The last-ditch plan to save coral reefs from utter destruction
10
Why you need to future-proof your brain in middle age and how to start