In general: human attempts to tame the nature tend to give a backlash. We create more problems than we solve, hurting ecosystems (and thereby ourselves) rather than helping. The frightening thing is that we often don´t realize the damage until it´s too late, and so we have to put out the fire instead of treading carefully and avoiding it in the first place. Preventing problems is always better than mending.
No energy source is without complications, so it´s not easy finding the perfect solution. Maybe there is none; maybe we have to pick "the best of the worst options" That´s a little pessimistic, but it´s obvious we can´t keep going like the western countries have done since the industrialization.
It´s really hard, isn´t it? There´s no way we can find all the raw material needed for renewable energy constructions in a sustainable way. The technology used for covering all our energy consumption is complex, no matter what energy source is used. Also, they often demand rare and/ or valuable raw materials.
I guess the best option is to NOT waste energy in the first place. Increased efficiency, saving energy and recycling might be the best ways to reduce emissions. The less we use, the less energy we need, and a larger part can be covered by renewable energy.
