The Steem blockchain (short Steem) is first of all a platform for blogs on which everyone who is registered there with an account can publish own contributions and comment such posts. In the case of Steem, blockchain only means that all contributions are stored in a chain of individual blocks and that this chain cannot be manipulated afterwards. Should this be attempted on one of the computers who manage the blocks of the blockchain, all other computers involved would recognize and prohibit this action.
To be able to pay for the deployment of the computers that manage the blocks and build the blockchain, there is a native currency on the blockchain. Just as bitcoin is at home on the bitcoin blockchain, it is the coin STEEM on the Steem blockchain.
Like on twitter e.g. it is also a concern for the users of the Steem blockchain to reach many followers. Anyone can give posts and comments of other steem users a like - on Steem called upvote. The special thing about Steem is that such an upvote has a monetary value, which is calculated in STEEM.
Steem-Engine, a side blockchain of the Steem blockchain, allows you to create your own coins and trade on the stock exchange of the same name. Here you can buy and sell various coins against STEEM. The coins on Steem-Engine are e.g. like the many coins on Ethereum (another well-known blockchain). To be active on Steem-Engine you have to have STEEM on your Steem account.
Current information is always published on Steem!
To access or read posts on the Steem you can choose between a variety of web portals.
To go directly to CO2Fund's blog usually you can add /@co2fund to the web portal's URL, e.g.
The CO2Coin on Steem-Engine
The price for the cryptocurrency STEEM ...and on another site
An exchange for STEEM (against the Euro)
Logged in with a Steem Account: Currently hold CO2Coins to support Compensation Projects
Not logged in: Currently hold CO2Coins to support Compensation Projects
(search for COCO in the section Steem Engine Token)