CHIA
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Chia (XCH), based on the Chia blockchain, says it is a greener cryptocurrency that requires only a fraction of the computing power for mining required by other cryptocurrencies. Its founders, who detail Chia in a "green paper," say their approach supports the climate goals in the Paris Agreement. Chia's Proofs of Space and Time validating tool, opposed to Proof of Work or Proof of Stake, means that Chia uses 0.16 percent of the annual energy consumption of other cryptocurrencies. It is also part of the Circular Drive Initiative, which aims to reduce e-waste.