Whatever you shovel needs a consistent and reliable supply. Like coal. We have a thousand years worth sitting in the ground. Or oil - still seems to oodles of the stuff. Both of which are demonstrably "cheap".
Unlike solar which in christchurch only shines 9 hours a day in winter, or wind which is unreliable, or tidal which goes slack during peak periods. Even hydro is unreliable and dependent on rain/snowfalls - unless we get more climate change going which will create more of the wet stuff.
Bookmarks