Blockchain : Parq- Building Green City
Parksen is building a Green, Smart and Connected City Platform – powered by the Ethereum blockchain, immutable smart contracts and a real-time parking app. [#**PARQtoken**](https://twitter.com/hashtag/PARQtoken?src=hash) [#**GoGreen**](https://twitter.com/hashtag/GoGreen?src=hash) [#**SmartCity**](https://twitter.com/hashtag/SmartCity?src=hash) [#**SmartParking**](https://twitter.com/hashtag/SmartParking?src=hash) more info at r/https://www.parqtoken.com/
What is the Blockchain?
A block chain is a transaction database shared by all nodes participating in a system based on the Bitcoin protocol. A full copy of a currency’s block chain contains every transaction ever executed in the currency. With this information, one can find out how much value belonged to each address at any point in history.
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