In my previous post on this topic I have explained the basics of proof of work (PoW) consensus mechanism in the blockchain network. Now in this second part I am going to state some features of this mechanism and some problems like using huge amounts of energy.

If you just think about the popularity of the Bitcoin network is the trust and security of the network. No blockchain would have been secured without any consensus mechanism like that. As it is automatically done by the different users from different parts of the world so it is secured and trust has been achieved in that way. That's why people come into the network whether it is decentralized or not. This bitcoin technology got popularity from the sense of decentralization and security. The coin is limited and mining should be done in a proper way. But still there is a problem with this PoW system that is using a lot of energy that is computation power which consumes a huge amount of electricity. For a developed country it is almost similar to the price like the electricity price. For the countries where the electricity price is low there it is possible to get some benefits from mining. PoW uses a lot of energy. This is a common concern. Large mining farms use massive electricity. This leads to environmental debates. Some people support it. Others want better solutions. Despite this, PoW is trusted. It has worked well for many years. It is simple in concept but strong in design. Many early blockchains use it. It proved that decentralized money can work. It builds trust without a central party.

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