Blockchain networks based on proof of work mining consume a lot of energy. This is by design, as the energy expended to process transactinos is part of the security model that protects the network from would-be attackers. The Palm network uses a different security model that ditches the high energy consumption and instead relies on a pool of known validators to secure the network from malicious 3rd parties.
While mainnet Ethereum has plans to phase out proof of work mining over time to a more environmentally friendly mechanism called proof of stake, Palm network provides an immediate solution to the ecosystem that allows eco-conscious artists and brands to dive into the world of NFTs without the heavy environmental footprint.