Clean & renewable energy

This archive tracks real progress in clean and renewable energy — from solar and wind expansion to grid upgrades and policy wins. Each story focuses on what’s working, where, and why it matters for people and the planet.

Depiction of microchip storing solar energy in liquid, for article on solar energy storage

‘Radical’ solar technology breakthrough allows energy to be stored for up to 18 years

Solar energy that lasts 18 years in a bottle? Researchers at Sweden’s Chalmers University have built a molecule that absorbs sunlight, holds it as a liquid, and releases it as electricity only when a catalyst says go. To prove it works, they charged the liquid with Swedish sun, shipped it to a partner lab in China, and three months later powered a tiny chip — just 800 nanometers thin — that turned the stored sunlight into electricity. Output is still small, but the concept is validated. If it scales, it points toward a future where clean energy isn’t tethered to grids or mining-heavy batteries, but travels quietly in a jar to wherever people need it.

Wind turbines at dusk, for article on floating solar auction

Portugal’s floating solar energy auction sets world record negative price

Portugal’s floating solar auction just made history with a negative price: one winning bidder agreed to pay the grid 4.13 euros per megawatt hour for the right to generate clean electricity over 15 years. EDP Renováveis pulled this off by bundling 70 megawatts of floating panels on Western Europe’s largest artificial lake with wind power and battery storage, letting the profitable pieces carry the solar contract. The environment ministry estimates the auction will deliver 114 million euros in savings for Portuguese electricity consumers. It’s a striking signal of how far renewable economics have come — and a glimpse of what’s possible when countries get creative about stitching clean energy technologies together.

Solar panels amidst trees and bushes, for article on global wind and solar share

Wind and solar generated a record 10% of the world’s power in 2021

Wind and solar power together generated 10.3% of the world’s electricity in 2021, crossing double digits for the first time in history. That’s a remarkable leap considering these two sources were barely a blip on the global grid just twenty years ago. Fifty countries now pull more than 10% of their power from wind and sun, with Denmark leading the pack at 52%. Even China, the world’s largest electricity market, quietly joined the 10% club that same year. The milestone matters because it shows the clean energy transition isn’t a far-off hope but a measurable, accelerating shift — one that, if its current pace holds, could keep the power sector aligned with the 1.5°C climate goal.

Wind turbines, for article on recyclable wind turbine blade

General Electric produces its first 100% recyclable wind turbine that can be reconstructed as it ages

Recyclable wind turbine blades just moved from concept to reality: a French-led consortium has built a 62-meter prototype in Ponferrada, Spain, designed to be fully broken down and reused at the end of its life. The secret is a thermoplastic resin called Elium, which can be chemically separated from its glass fibers so both materials return to the manufacturing stream as good as new. Engineers will now put the blade through structural lifetime testing in Denmark, with the recycling process itself validated soon after. If the approach proves commercially viable, it could close one of renewable energy’s most persistent loops — turning the blades that power our clean-energy future from a looming waste problem into a genuine circular success story.