Please define environmentally neutral. Because alcohol will just oxidize into water and CO2. Do you want to just sequester the Carbon? Something very environme

Please define environmentally neutral. Because alcohol will just oxidize into water and CO2. Do you want to just sequester the Carbon? Something very environmentally neutral would be .... plastic. Anything biodegradable would eventually become CO2 and water. Best option is to burn it and capture the energy for a useful purpose, instead of letting that energy be wasted when it biodegrades.