Dying conifer

Haven't been up the garden since before Christmas but today I've been up and saw that our 7ft golden conifer which looks perfect from the house is black on the bottom 3 foot. Upset is putting it politely. Is it a lost cause I'm thinking it is
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If the top/ends of the branches are OK you could experiment with cloud pruning.
Or prune off the dead stuff and plant other things in front/around it to hide the bottom part.