Coal phobia began when Bartolomé de Las Casas, the first Spanish Priest to be ordained in the the new world during 1600's heard Hatuey (ex-slave/captured rebel leader) state the offensive insult that he'd rather go to hell then heaven to avoid Spanish cruelty. To remove the objection to Catholic identity conversion, Las Casas reduced cruelty by endorsing the mass migration trans continental slave trade to generously reduce the workload of the local slaves, but some objected to slavery.
Las Casas then continued to remove all objections including cruel suffering, Coal fired sugar mills that transformed the environment, colonialism, & eventually declared the Spanish government illegal despite that it funded & supported his campaigns. Point is you can never remove all objections to cruelty because the quest for Utopian perfection creates intolerance of anything that is not pure as spinning color wheel.