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Renewable energy just notched a major milestone.

Worldwide, renewables produced more electricity than coal across the first half of this year — a first, according to clean-energy think tank Ember.

The global revolution in solar deployment made the milestone possible. The energy source more than doubled its share of global electricity generation over the last four years alone, rising from 3.8% in 2021 to 8.8% in the first half of 2025. Wind power also grew modestly during the first half of the year.

Taken together, the two clean-energy sources increased fast enough to not only meet all new electricity demand in the first six months of 2025, but to displace a bit of fossil fuel use as well.

Despite the progress, coal remains the single largest source of electricity in the world. No renewable-energy source on its own — be it wind, solar, hydro, or bioenergy — measures up to coal. And although renewable energy on the whole has now surpassed coal, it’s not like coal generation is plummeting. Power plants still plowed through more coal in the first half of this year than they did in the first half of 2021.

But coal power is stagnant. Meanwhile, renewables, and solar in particular, are ascendant. This latest milestone is worth celebrating not because fossil fuel use has been dealt a fatal blow, but because it’s a clear illustration of the trajectory each energy source is on.

For the world to truly reorient itself around energy sources that don’t bake the planet and spew toxic fumes into the air, those trends must not only continue but accelerate. Coal — and eventually gas — will need to decline as assuredly as renewables soar. Let’s call this a step in that direction.