Creating a synthetic hydrocarbon that eliminates harmful byproducts during combustion is highly challenging. Burning hydrocarbons in oxygen will always produce some reaction products, primarily carbon dioxide, which is a significant greenhouse gas. While CO2 is often viewed as harmful, it is thermodynamically a desirable outcome of hydrocarbon combustion. The discussion raises questions about what constitutes harmful byproducts and the feasibility of developing cleaner alternatives. Overall, the consensus is that complete elimination of harmful emissions from hydrocarbon combustion remains unlikely.