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.
The economics of making biofuels from algae no longer add up, but a lesson from the oil industry could make them viable.
The airline industry's promised technological solutions have not arrived, and they never will.
A White House proposal to tax crude oil would address the U.S.‘s perennially underfunded highway maintenance program.
Obama's proposal to add $10 tax to crude oil raises the thorny question of whether the U.S. can continue to fund its highway infrastructure with a fuel tax that hasn't changed since 1993.
Before there was E10, in the 1970s there was ‘gasohol,’ another name for gasoline that had been blended with ethanol.
Ted Cruz opposes subsidies for biofuels and still managed to win in ethanol-friendly Iowa. Is corn ethanol starting to lose its political clout?
An excavator clears land for a palm oil plantation in southern Sierra Leone for a Lichtenstein-based a company. Such projects are criticised by some as ‘land grabs’.
International development banks are supposed to ensure adherence to human rights in the projects they fund. Instead, their practices provide fertile ground for human rights abuses.
Just because we've got electric supercars, doesn't mean it's the only way to a greener future.
Proper management of Africa’s savanna regions is crucial for the continent’s climate and food security future.
Africa's savannas provide high potential for farming development but this needs to be done in a smart manner to not worsen climate change.
Traffic is one of the major sources of pollution worldwide, particularly in Asia’s packed cities.
Outdoor air pollution causes 3.3 million premature deaths a year, mainly in Asia. And without policies to cut particulate pollution from traffic, industry and home biofuels, the deaths could double by 2050.