Idea on alternative energy

I proposed some time ago dropping small fusion bombs down a chute of sorts, deep into the earth, where the energy released could be put to productive use through turbines and heated water. It’s probably a dumb idea, but may be close enough that it can be smartened up by someone with a more extensive engineering background than me.  It has long been my understanding that nuclear fusion, of which the hydrogen bomb is obviously the best example, is vastly more efficient than fission.

Here is an alternative idea.  As I understand the matter, the problem with solar and wind is that they are intermittent.  And wind towers are ungodly expensive, kill a lot of birds, and are ugly as bear shit.  Being intermittent, they cannot be relied on as steady power sources, which means in practice that countries like Denmark, which have tried to adopt wind technology, have to “borrow” nuclear power on a regular basis from countries like Germany.  If Germany did the same thing, they would have regular blackout, which is not a very good solution to solve a problem–Anthropogenic Global Warming–which does not even exist.

Long ago I wondered about giant batteries, but this is apparently not feasible.

Here is an alternative: what if you built large underground reservoirs of some material like water, or something better yet to be invented, which takes in and holds heat.  Run pipes of it through the sun in places like Nevada, such that it absorbs the radiant heat, then put it back into its “thermos”.  This material–let’s say it is water–can then be evaporated at a steady rate.  It can HOLD the energy it takes in, and release it in controlled ways.

I am no expert in physics, but perhaps a system can be designed in which the heat itself creates the suction to pull it in and push it out.  This is another huge problem with alternative energy sources: wind in particular takes more in fossil fuels to create (i.e. physically building the turbines then shipping them on the back of a truck somewhere to be erected with cranes on sites cleared by bulldozers) than it will ever generate out on a wind swept prairie.  It does make tree hugging hippies (not that there is anything wrong with that) feel good, but if the goal is reducing dependence on fossil fuels, it is an abject failure even on that level.

It seems to me–and I concede in advance and openly that I am perhaps being ignorant and stupid–that the focus on converting energy to immediate use, like photovoltaic solar cells, obscures the fact that energy can be taken up and stored in many forms.