Blockchain protocol developer Algorand has found its first major environmental use case in air pollution initiative PlanetWatch, a startup that bundles elements of blockchain currency trading, air pollution sensor deployment and a data marketplace in an altogether perplexing offering. It’s still very early days for PlanetWatch, but – as is often the case – we find it hard to see this becoming a key new use for blockchain within the IoT. The ideas behind the project are certainly intriguing, but as Riot has observed numerous times, most blockchain business ideas never get to the required level of ubiquity in order to provide the service they intend to – failing to reach critical mass. PlanetWatch is using Algorand’s platform to create…