As investors consider cryptocurrency and blockchain equities as a long-term thematic investment, they should be aware that environmental sustainability standards are still evolving for this relatively new industry.There are some misconceptions regarding electricity usage, and early signs show that most mining companies have taken steps to move toward renewable energy and become more environmentally friendly.Since the industry is relatively new, multi-page sustainability reports for these companies are not as readily available as other public corporations, which may add to the negative perception.