Opencast mine
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Miller Argent prepares opencast mine site planning bid

29 May 2013 Last updated at 20:37 BST

The operator of Wales' largest opencast mine is preparing a planning application for a new site in Tredegar despite facing strong local opposition.

Miller Argent says it will provide hundreds of jobs and other economic benefits in the area.

Sachin Krishnan has been taking a look at whether coal is still worth investing in a generation or more from its heyday.