Great idea.
Solarcoin is a nice suggestion.
Or perhaps GRC can follow the same way as NANO does for off setting their CO2 footprint.
Here's the link: https://isnanogreenyet.com/
They work with https://reforestum.com/
I don't posses any nano but it came up when researching low emmision currencies.
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Absolutely. I was going to address this option as well. The more cryptocurrencies that are involved, the stronger the multi-currency economy, its applications, and its popularity, making the whole ecosystem more viable. I definitely think that having multiple cryptos involved is the right way to go.