Turning the USA into a net-zero carbon economy could involve covering a landmass equivalent to seven states in geoengineering infrastructure, according to environmental social scientist Holly Jean Buck. More
The UK needs to drastically improve its "poorly insulated, draughty" homes if it is to eradicate its carbon emissions, according to Hayden Wood, CEO of renewable energy supplier Bulb. More
Millions of homes could generate small amounts of solar energy to help eliminate carbon emissions from the UK power grid, according to Hayden Wood, CEO of renewable energy supplier Bulb. More
Berlin design student Tobias Trübenbacher has developed a lamp post with an integrated wind turbine that produces its own renewable energy and only lights up when needed. More
Colombian renewable energy start-up E-Dina has developed a cordless light that converts salt water into electricity as a more reliable alternative to solar lamps in off-grid communities. More
Dutch designer Marjan van Aubel has developed a solar lamp that is designed to be hung in front of windows so it can generate its own energy. More
In this week's comments update, readers are discussing plans to build a linear city in Saudi Arabia and sharing their views on other top stories. More
Mohammed bin Salman, the crown prince of Saudi Arabia, has unveiled plans for a 100-mile belt of zero-energy walkable communities for a million people. More
Engineering student Carvey Ehren Maigue has been named the James Dyson Awards first-ever global sustainability winner for his AuReus system, in which waste crops are turned into cladding that can generate clean energy from ultraviolet light. More
Scientists at the UK's University of Cambridge have developed a renewable energy device that mimics photosynthesis by making fuel from sunlight, carbon dioxide and water. More
Zaha Hadid Architects has shared its design for the CECEP Shanghai Campus in China, which will utilise renewable energy technologies and recycled materials. More
BIG has revealed visuals of the "whimsical" plant-covered H C Andersen Hotel it has designed for the Tivoli Gardens amusement park in Copenhagen. More
Hungary has revealed plans to build a new carbon-neutral greenhouse-filled farming city that will be powered by renewable energy sources. More
Renewable energy could reliably power the grid at peak times using an eco-friendly and cost-effective storage solution designed by Swiss start-up Energy Vault. More
Brooks + Scarpa principals Angela Brooks and Larry Scarpa explain their concept for a public pavilion that could harness energy from lightning in our penultimate P.O.D.System Architecture movie. More
Renewable energy is now used to power all of Apple's retail stores, offices and data centres in 43 countries including the United States, the United Kingdom, China and India. More
Haptic and Nordic Office of Architecture have released plans for a city next to Oslo Airport that is to be completely powered by self-produced energy and served by driverless electric vehicles. More
A man-made island surrounded by wind farms in the middle of the North Sea could help bring large-scale renewable energy to Europe by 2050. More
Curl la Tourelle Head Architecture has drawn up plans for "London's greenest public building", a school that would be entirely powered by tidal movements of the River Thames. More
Architect Jouke Post has used recyclable materials to create a sustainable house for his family near Rotterdam, which he claims is the first Cradle to Cradle house in the Netherlands. More
