indigenous coal

基本解释

This article analyzes the new type pulverized coal combustion technology adopted in the indigenous supercritical pressure boiler.
分析了我國超臨界和超超臨界鍋爐採用的新型煤粉燃燒技術。

Liquid fuels are required, and in South Africa's case, 29% of demand is met through coal conversion by an indigenous but increasingly international company called Sasol.
FORBES: Magazine Article
And as indigenous supplies fall, a looming shortfall in electricity generation (elderly nuclear plants and dirty coal-fired stations must soon be closed) will have to be met largely through more gas, which already provides 40% of Britain's power.
ECONOMIST: Britain’s dependence on gas imports will increase