The world’s largest producer of coal, Coal India Ltd., has sought bids to build 5 gigawatts of renewable projects, an effort to diversify its portfolio in view of a possible decline in future coal demand.

The state-owned company sought expressions of interest for the construction of 3 gigawatts of solar and 2 gigawatts of wind projects, according to documents posted on the company’s tender portal on Tuesday. The last date for bid submissions is Sept. 16.

The miner’s most ambitious green plan yet comes as it faces muted demand and shrinking market share due to competition and a growing renewable fleet in the country. That has forced it to look beyond coal mining and explore opportunities in critical minerals as well as power generation.

The company has doubled its renewable targets in th

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