The geothermal project in remote areas in Kenya to mine bitcoin to fund conservation efforts and provide electricity for the small local population. This is easily a good humanitarian idea and can foster local economy.

The El Salvador (with geothermal power development) program could also be a nice way to fund government and boost local economies.

Using excess power generated by renewables can help fund the development the renewable power sources. In slack power times use the power for mining. It is done already in other industries.

Remember that the mining does not just generate bitcoins but is a way to pay people to maintain the bitcoin network. Instead of banks handling the transaction miners do. Having a functioning monetary system is generally a good thing. Not that we do not have this already but the crypto currency system offer an alternative. Concentrating on the mining is sort of missing the point of crypto currency.

I would not want to argue that all the project are meeting the stated goals. I am sure that lots of the real goals are for some to make a mint. There is plenty of corruption all around and this is not unique to crypto currency. It is not going to solve all the worlds problems but it has its positive points also.

Edit: Will also add that (just like more traditional banking) there are lots of people doing real work to make these things happen.