Fuel

A fascinating new type of motorcycle has finally hit the road. The Bajaj Freedom 125 sells for less than US$1,150, and it's the first bike to offer a 2-kg Compressed Natural Gas (CNG) tank alongside a 2-liter petrol tank for cheaper, cleaner riding.

A revolutionary alternative to conventional rockets that uses controlled explosions has completed its first long-duration engine test as part of Venus Aerospace's partnership with DARPA to develop a Rotating Detonation Rocket Engine.

A simple, cheap pretreatment promises to radically cut the price of sustainable aviation fuel (SAF) made from waste wood biomass – potentially making it cost-competitive with fossil-based jet fuel, while cutting down emissions by up to 80%.

In a topsy-turvy bit of military aviation, the US Air Force used a C-5M Super Galaxy heavy transport to refuel a KC-10 Extender refueling tanker aircraft, pumping fuel backwards up the boom from transport to tanker instead of the other way around.

Airbus innovation division UpNext is testing its next-gen autonomous systems for air-to-air in-flight refueling, which could be a revolutionary leap forward for a variety of military and civil aircraft, safely extending range and endurance.

Since the 1960s, scientists have been turning to an unlikely harvesting ground for uranium: the world's oceans. Now, researchers have moved the prospect of sea-based uranium harvesting another step forward by using a cheap and easy-to-make material.

As any car-chase action movie will tell you, the gasoline used in our vehicles is flammable, explosive stuff. Scientists have created a new combustible fuel, however, which stays safely non-flammable for transport and storage.

Plastic waste is one of the most pressing environmental problems of our time. Now, engineers at MIT have developed an effective new catalyst that breaks down mixed plastics into propane, which can then be burned as fuel or used to make new plastic.

Leaves are impressive machines, converting sunlight, carbon dioxide and water into energy. Cambridge scientists have now created artificial leaves that can float on water, tapping into sunlight above it and water below to efficiently produce fuels.

Decarbonizing shipping is an enormous challenge, and green ammonia has some serious issues as marine fuel. It seems the industry is leaning toward methanol and dual-fuel setups as an early measure, so let's take a look at methanol's clean potential.

As effective as fossil fuels may be, their impact on the planet cannot be overstated. Now researchers at Berkeley Lab have coaxed bacteria into directly producing a new biofuel with an energy density significantly higher than jet fuel.

Engineers have demonstrated a pilot system that produces fuels from sunlight and air. The device captures carbon dioxide and water from the air and uses solar energy to convert it into syngas, which is then converted into carbon-neutral liquid fuels.