More than 90% of human activities affects environment in one way or the other. Most of the  facilities we use reach our hands after exploitation of natural resources.  New ways need to be invented which have least effect on the environment as petrol diesel coal is being replaced by solar wind energy though it is in its initial stages.  LED technology being replaced and is being used instead of conventional lights bulbs a good step forward saving environment. 
In the initial stages every invention creates  problems of pollution but afterwards with advancement of technology we may control it.
Major problem is usage of Petro products which need quick replacement. 
Leadership with strong positive attitude are trying and marching ahead in this direction. 
All of us need to save energy , least usage of man made things will save earth environment.  People need to be educated for simple natural living.
Just bitcoin can't be blamed fiat currency paper  currency also affects environment due to trees cut for printing also electricity used for it.