Yet here in Wales we are still proposing new roads that destroy increasingly rare habitat.

The M4 relief road key points:

The Welsh Government wants to build a £1.1bn six-lane motorway to the south of Newport.

The 14.23m (23km) highway will be between the current M4 junction 23A at Magor to junction 29 near Castleton.

The Welsh Government plans to begin construction in 2018 and open the new road in 2021.

The Welsh Government said the current M4 around Newport, opened in 1967, “does not meet modern motorway design standards”.

Environmental campaigners and local residents claim the scheme will devastate the ancient marshlands of the Gwent Levels and four sites of special scientific interest.

There have been 335 formal objections, compared to 192 letters of support.

A public local inquiry is expected to last five months.

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