Helsinki turned abandoned 1970s oil caverns into a giant underground heat battery holding 260,000 cubic metres of hot water; it can heat 25,000 homes for a year
Anand Kumar
Anand Kumar is a Senior Journalist at Global India Broadcast News, covering national affairs, education, and digital media. He focuses on fact-based reporting and in-depth analysis...
Anand Kumar is a Senior Journalist at Global India Broadcast News, covering
national affairs, education, and digital media. He focuses on fact-based
reporting and in-depth analysis of current events.
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