TSMC now buys more green electricity in Taiwan than abroad, a milestone that answers long-running criticism that Taiwan's clean power was too slow to keep up with its biggest chipmaker.

• TSMC's plants worldwide used about 28.8 billion units of electricity last year, roughly a tenth of Taiwan's total power use.
• Nearly 90% of that was used in Taiwan, confirming the most advanced chipmaking stays home.
• A giant offshore wind farm started sending power to TSMC last September, making wind its largest source of clean energy.
• Green power bought inside Taiwan finally passed what TSMC buys overseas, easing doubts about whether local supply can meet chip industry demand.

Outlook: With the wind contract locked in for two decades, TSMC's Taiwan green power share should keep climbing toward its all-renewable goal.