Rooftop solar capacity grew nearly 50% worldwide in 2022
Installed rooftop solar grew from 79 gigawatts to 118 gigawatts worldwide last year and is projected to reach 159 gigawatts by the end of this year.
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.
Fossil fuels now account for less than half of China’s power capacity
In 2021, China set a goal for renewable capacity — including wind, solar, hydro, and nuclear power — to exceed fossil fuel capacity by 2025, a target that it has hit two years ahead of schedule.
Wind and solar generate more power than coal in the U.S. over five months for the first time ever
“From a coal perspective, it has been a disaster,” said Andy Blumenfeld, an analyst who tracks the industry at McCloskey by OPIS. “The decline is happening faster than anyone anticipated.”
World-first space solar demonstration beams power from orbit to Earth
Space-based solar power just crossed from theory into reality: a Caltech team has, for the first time, beamed energy from orbit down to a receiver on Earth. The signal arrived at a rooftop in Pasadena exactly when, where, and at the frequency engineers predicted — proof that the precision needed for a future full-scale array is achievable. The demonstrator weighed just 50 kilograms and used flexible, lightweight arrays never before flown for this purpose. The eventual vision is enormous and far from cheap, but the appeal is simple: panels in space see no night and no clouds. If this technology matures, clean power could one day reach communities far beyond the grid’s reach.
New Zealand announces $140m project to transition its major steel plant from coal to renewable energy
New Zealand is putting $140 million toward swapping out the coal furnaces at its largest steel plant — a single project that will shrink the country’s total emissions by a full 1%. The Glenbrook plant currently burns coal to turn iron-rich sands into steel, but a new electric arc furnace will melt recycled scrap instead, drawing power from a grid already running on roughly 80% renewables. By 2027, the switch is expected to cut 800,000 tonnes of carbon a year — more than every other government-funded emissions project combined. Heavy industry has long been called the hardest sector to decarbonize, and this is exactly the kind of proof-of-concept the rest of the world needs.
India pauses plans to add new coal plants for at least five years
India just hit pause on new coal. The country’s Ministry of Power won’t consider new coal-fired power plant proposals for at least five years, opening the door for renewables to take on more of the load. India already ranks fourth globally for installed wind and solar capacity, and the updated plan aims to push non-fossil sources to 57% of the energy mix by 2027. To handle the swings of sun and wind, planners are pairing the buildout with 51.5GW of battery storage by 2030. For the world’s third-largest emitter, a pause like this is more than a planning tweak — it’s a signal that the future of electricity for 1.4 billion people is being written in renewables.
Helion announces world’s first fusion energy purchase agreement with Microsoft
Fusion energy just took a big step from lab to grid: Helion Energy has signed the world’s first commercial fusion power purchase agreement, promising Microsoft at least 50 megawatts of electricity from a plant targeted to come online in 2028. That timeline is roughly a decade ahead of most expert projections for commercial fusion. Helion has already built six prototypes and reached the 100-million-degree plasma temperatures considered necessary for self-sustaining reactions, with Constellation handling the grid-side logistics. The engineering road ahead is steep, and nothing is guaranteed. But moving fusion from research aspiration onto a real buyer’s procurement list is a meaningful shift, hinting at a future where zero-carbon baseload power becomes a practical piece of the climate puzzle.
Planes in the E.U. will have to be partly powered by sustainable fuel
By 2025, 2% of fuel offered at EU airports must be sustainable aviation fuels (SAF). This must rise to 6% by 2030, 20% by 2035, and 70% of by 2050.
China completes and activates massive solar farm in the Gobi Desert
The first of many solar and wind projects in China’s deserts is now online, and it’s capable of powering a staggering 1.5 million households.
British wind power overtakes gas for the first time
Wind power just crossed a historic line in the U.K., supplying 32.4% of the country’s electricity in the first quarter of 2023 — narrowly beating gas at 31.7%. It’s the first time on record that wind farms have outpaced gas plants over a full quarter, and renewables together delivered nearly 42% of Britain’s power. Decades of offshore wind investment, falling turbine costs, and the urgency triggered by Europe’s 2022 energy shock all helped get the country here. The lead researcher called it a “genuine milestone,” and rightly so. For climate movements everywhere, it’s quiet proof that energy transitions, however slow and contested, really do arrive — and once the turbines are built, the wind keeps blowing for free.