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The dramatic decline in the cost of renewable energy stands in stark contrast to the soaring prices of fossil fuels, offering a hopeful outlook amid the ongoing climate crisis. Despite rising emissions and slow governmental action, there is a significant glimmer of progress demonstrated by the rapid expansion of solar power. Over the past few years, solar energy has grown at an extraordinary rate, with the amount installed worldwide doubling between 2022 and 2024. In the first three quarters of 2025 alone, solar installations accounted for 83% of all new electricity generation capacity, a growth spurred by a near 90% reduction in costs per kilowatt-hour during the last decade. Battery costs, key to storing renewable power, have also plummeted by a comparable margin.
Looking at the bigger picture, the cost reductions in solar technology represent a historic shift in energy pricing. In 1975, solar power cost about $100 per watt, making it one of the most expensive energy sources at the time. Today, the price has dropped to just 20 cents per watt—a stunning decrease of 99.8%. Alongside affordability, the speed of deploying solar power has accelerated tremendously. Where installing one gigawatt of solar capacity once took a full year in 2004, recent data shows that, by 2023, this process can be completed in just 24 hours, and it continues to get even faster. Environmentalist Bill McKibben highlights in his book, *Here Comes the Sun*, the scale of these developments, pointing out that Pakistan installed enough solar capacity in the past year and a half to cover a third of its current grid capacity.
Renewables overall are now growing quickly enough to meet all new global electricity demand, with wind power also enjoying substantial cost reductions of around 80% over the last decade. This surge has led renewables to surpass coal in electricity production for the first time. In the UK, renewables supply 37% of electricity needs compared to 35% from fossil fuels. Although fossil fuels still provide over half the world’s electricity, their share is decreasing. While political figures such as Donald Trump have continued to criticize wind and solar power, market realities show that renewable energy developments are outpacing opposition, especially given the increasing urgency brought about by recent geopolitical conflicts affecting fossil fuel supplies.
China exemplifies the scale of renewable growth, having added nearly 400 gigawatts of solar and wind power capacity in 2025—equaling the amount added by the rest of the world combined. Despite its reputation for coal dependence, China is a global leader in renewables and electric vehicle adoption, with half of all vehicles sold there now electric. This transformation has contributed to signs that the country’s carbon emissions are stabilizing or beginning to decline, despite rising electricity demand. Such progress in the world’s largest emitter suggests that decoupling economic growth from carbon emissions is possible. Similar trends are appearing elsewhere, such as in the UK, where electric vehicle registrations continue to rise while petrol car registrations fall. Together, these developments in power generation and transportation provide a vital sense of optimism in the face of ongoing climate challenges
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