On the other hand reversible heatpumps work great with floor heating.

Having a cool floor during a heatwave is amazing, plus no noise,

The main problem here is not that toxic waste has been stored in mining tunnels.

The main problem is that there are tons of dangerous chemicals that need to be stored somewhere. It’s all residues from incinerating waste. Once we have all these waste what do we do with it ? Is there a better option than being buried deep in mining tunnels ?

We absolutely need to reduce the waste we produce.

Also, everyone should have a look at what happens to mine tailings. The prices of mining leaves begins hundreds of millions of tons of toxic material containing heavy metals like mercury, cyanide of arsenic.

The method of dealing with it is just to build a dam and store it on the surface. It contaminates the land, the water, sometimes the dam breaks and buries entire villages under toxic waste. No one really cares because most of the mining happens in third world countries, remote communities and because it is needed to feed the global consumerism way of life.

It depends on the kind of heatpumps, in a lot of cases the heatpump is installed to replace a boiler, reusing the radiators and hot water circulation already available.

Unfortunately in this case the heatpump cannot be used as AC.

It’s much darker than what I thought. For me a mickey is a booger.

It’s not that hard actually, if you don’t want them to catch the wind you let them rotate freely and they will automatically face the wind in a way where they have almost no drag.

It’s much easier to automate than a regular sail. It self aligns with the wrong and with one or two actuators your set the direction you want to go too.

Automating flexible sail would be way, way harder.

Even Putin still has his legion d’honneur.