China's Renewable Energy Leap: Solar, Offshore Wind and the Global Shift Away from Coal

Short Summary

Science Weekly examines how China’s renewable-energy surge is reshaping global energy geopolitics. Gillian Ambrose and Amy Hawkins discuss solar, offshore wind, coal use, and the challenges of energy security and grid reliability, with implications for climate progress and international power dynamics.

Overview: China’s Green Push and Global Context

Science Weekly examines how Beijing's energy transition sits at the center of global energy politics. Gillian Ambrose notes that China accounts for nearly 60% of global renewable capacity growth each year, with offshore wind capacity rising and projected to about 37 GW by 2030, while hydropower follows a similar growth trend. Solar power has become a pivotal part of China's clean energy strategy; around Paris, China was already a major solar component supplier, but its own solar usage grew dramatically over the past decade. Some observers even speculate that China could reach solar capacity in the hundreds of gigawatts to more than a thousand gigawatts later this decade, a scale that dwarfs the UK system.

"China accounts for nearly 60% of global renewable capacity growth every year." - Gillian Ambrose

Renewable Growth: Solar, Wind, and Supply Chains

Offshore wind is set to drive much of the expansion, with China accounting for almost half of the net increase in this sector by 2030. Hydropower is also on a strong growth path, with the country expected to contribute a large share of global hydroelectric expansion to the decade's end. Solar remains the star of the clean energy transition, with China leveraging its early manufacturing position to dominate global solar supply chains, while domestic solar adoption has surged, powering tens of millions more homes than a decade ago. Predictions about total solar capacity vary, but many observers point to a scale well above today’s global norms, underscoring the magnitude of China’s push to decarbonize its electricity system.

"the five biggest solar companies report a combined financial loss of ¥8 billion." - Gillian Ambrose

Coal, Emissions and the Energy Mix

Even as renewables surge, coal remains a large, sometimes dominant part of China’s energy mix. Most recent data shows roughly 38% of electricity from low-carbon sources, with coal still responsible for the majority of Chinese power. The government signals coal will continue to play a role for energy security, and the annual work report underscores this continuity. The paradox is clear: China is the leader in solar and other clean technologies while remaining the largest emitter of carbon, a tension that defines the country’s ongoing energy strategy.

"the world's green energy leader is also still the world's biggest emitter of carbon." - Gillian Ambrose

Industry Dynamics and Global Implications

Price declines have helped renewables grow but have also squeezed manufacturers, with Beijings’s Big Five solar firms reporting substantial losses as subsidies wind down and the market becomes more competitive. The resulting concentration in the solar supply chain raises concerns about security and the risk of over-reliance on a single producer. Yet, the broader shift toward cheap, scalable green electricity pushes more countries to engage with China’s energy ecosystem, including many developing economies. The IEA’s Fatih Birol has warned governments to diversify to avoid over-concentration and political risk, while still seeking the price advantages of large-scale Chinese solar deployment.

"the five biggest solar companies report a combined financial loss of ¥8 billion." - Gillian Ambrose

Geopolitics, Human Rights and the Path Forward

Beijing’s climate and energy drive sits alongside geopolitical complexities and labor-rights concerns in supply chains. Amy Hawkins notes that China’s leadership emphasizes energy security, rebalancing its economy toward high-tech industries, and that the social dividends of cheap energy matter for political power. The viral notion of China maxing on green energy reflects a broader narrative about who leads the climate transition, and the episode closes by highlighting the need for transparent governance and diversified energy partnerships as the world pursues affordable, reliable clean power.

"the government really does see a role for coal continuously." - Amy Hawkins