Data centers are equipped with diesel generators for emergency use only. It is a convenient source of energy that can be mobilized quickly in the event of a disaster or long term power outage. It was never intended  for day-to-day power generation. I oppose the use of diesel for anything other than emergencies since it is a filthy, highly-polluting fuel. Living in a county with the highest concentration of data centers, I have experienced declines in air quality over the last few years. Please require data centers to find clean sources of fuel and protect the health of Virginia citizens!