Giant kelp (
Macrocystis pyrifera) is a potential energy crop.
Linking Tourism & Conservation/Flickr
Making biofuels from crops grown on land poses trade-offs between food and fuel. A new study looks offshore.
You can reduce your fuel consumption by 15-20% with improved driving habits alone – reducing emissions and saving money at the same time.
We analysed what the world's top 58 airlines – such as American Airlines, British Airways and Qantas – are doing about climate change. Even the best airlines are not doing anywhere near enough.
Many vehicles can’t just be powered by battery.
We can't decarbonise the whole transport sector with just batteries - sustainable fuels are essential.
A U.S. Navy F/A-18 Hornet launching from the USS Theodore Roosevelt on full afterburner.
Many current and former US military leaders call climate change a serious national security threat, but few of them mention the Defense Department's big carbon footprint.
Photo Art Lucas/Shutterstock
We don't notice the plant species we're losing, but we won't be able to ignore the effect of their loss on our supply of food and medicine.
A critically endangered Tapanuli orangutan from Sumatra, Indonesia.
Maxime Aliaga / Sumatran Orangutan Conservation Programme
Jokowi's re-election may put the global biodiversity at risk
A fan of fuel blends that contain as much as 85 percent ethanol.
AP Photo/Jim Mone
Vehicles made before 2001 could suffer fuel system or engine damage if they're run on E15.
A river dike on the Rio Nil near El Asintal, Guatemala.
(Consejo de Comunidades en Defensa del Ambiente del Municipio de El Asintal)
Increased use of renewable energies could help curb climate change, but the water required for their production has dispossessed rural Guatemalans.
The New Zealand government is introducing legislation to become zero-carbon by 2050, but will consider new permits for coal mining, offshore oil drilling and fracking on a case-by-case basis.
from shutter stock.com
Natural gas is touted as a “bridging fuel” to displace coal while moving to a low-carbon economy. In New Zealand, this is shortsighted and could lead to stranded assets and hold back renewables.
The potential clean energy sources are all around Sydney, just waiting to be harnessed.
Collage by Rocco Furfaro
Sun, wind, waste biomass, geothermal, tides and waves: all these energy sources in Sydney's backyard add up to a zero-carbon energy solution for the city.
A medium-size passenger jet burns roughly 750 gallons of fuel per hour.
Scientists have engineered sugarcane to increase its oil content and are developing renewable jet aircraft fuel from the oil. The engineered sugarcane could become a valuable energy crop.
The climate change-mitigating dream turns out to be a green damp squib.
The great dream of cars running on sustainable petrol has not bitten the dust. Here's why.
Polysaccharide molecules such as cellulose, seen here, are long chains of sugars that are very hard to break apart. Enzymes – proteins that can degrade polysaccharides – have many industrial uses.
Bio-prospecting is the search for useful materials from natural sources. A biologist explains what we can learn from bacteria about breaking down plant material, and how we can use that knowledge.
Papyrus can alleviate pressures on native forest ecosystems.
The capacity of woody biomass to provide the energy requirements for sub-Saharan Africa is declining. Papyrus wetlands are a sustainable source of biomass that holds potential to substitute for wood.
Soybeans and corn are two of the most widely planted crops in the United States and the main feedstocks used to make biofuels.
A new study challenges the longstanding view that biofuels are carbon-neutral, and asserts that in the U.S. to date, they have done more harm to the climate than gasoline.
Ethanol made from corn goes into our gas tanks. Now refiners who pay for the subsidy are complaining of rising costs.
A fight's breaking out over who should pay subsidies for corn ethanol, and it is consumers who may end up paying for any changes.
Millions of tonnes of food go into landfill each year.
Food waste image from www.shutterstock.com
Australians send about 4 million tonnes of food waste to landfill each year – but what if we could use it for other purposes?
Blue Mallee leaves in a plantation. The white dots are oil globules.
Eucalyptus oil is useful for lots of things – what if that list also included carbon-neutral aviation fuel? Chemistry suggests it could.