Final answer:
Switching fleet vehicles to hybrids will not automatically ensure higher achievements in reducing operational energy consumption, as their benefits are context-dependent and may be offset by higher upfront costs and practical challenges.
Step-by-step explanation:
Using hybrid vehicles for all operations fleet vehicles will not necessarily contribute to higher levels of achievement for RA2.1 Reduce Operational Energy Consumption. While hybrids do have the potential to reduce emissions and save energy in certain contexts, their contribution to operational energy reduction depends on various factors such as the specific operations of the fleet, driving conditions, and the existing infrastructure for fueling and maintenance.
Furthermore, the increase in upfront costs, potential impracticality for certain uses, and challenges related to widespread adoption, such as those associated with grid infrastructure, may offset the benefits of switching an entire fleet to hybrids. Additionally, concepts such as Energy Return on Energy Invested (EROEI) and other alternative fuel sources that do not produce carbon dioxide should be considered when evaluating energy strategies.