#### Solution By Steps***Step 1: Understanding Blockchain Features***Blockchain is a decentralized ledger technology that ensures data integrity and transparency through cryptographic methods.***Step 2: Impact on Sustainability***Blockchain can support sustainability by enhancing data accuracy and accessibility, which is crucial for tracking and managing environmental impacts.***Step 3: Reducing Computing Power***By optimizing data storage and transaction processes, blockchain can indeed reduce the overall computing power required, thereby lowering energy consumption.***Step 4: Improving Energy Footprint***Efficient use of computing resources through blockchain can directly contribute to improving a company's energy footprint by reducing unnecessary energy usage.***Step 5: Enhancing Supply Chain Transparency***Blockchain provides a transparent and immutable record of transactions, which can help in tracking the environmental and social impacts of supply chains.***Step 6: Supporting Marketing and Cost Reduction***Accurate and transparent data facilitated by blockchain can improve marketing strategies and reduce operational costs, indirectly supporting sustainability efforts by optimizing resource use.#### Final AnswerBlockchain technologies support sustainability efforts by reducing computing power, improving energy footprints, enhancing supply chain transparency, and optimizing marketing and operational costs through improved data access and management.
