A giant solar farm planned in remote Northern Territory has been given environmental approval. 

Australian billionaire Mike Cannon-Brookes is backing the Sun Cable project that would send electricity to Darwin and beyond to Singapore, via an undersea cable. 

Today, Giles Parkinson from RenewEconomy.com.au on when it might be up and running. 

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Giles Parkinson, founder and editor of RenewEconomy.com.au