No, actually the burning of fossil fuels has radically improved the foundations of life on this planet. It has given us safe and inexpensive lighting, heating, cooling, refrigeration, transportation, electricity generation, construction, food production, and just about everything else we depend on for our standard of living. To the extent it has also caused a slight warming of the atmosphere due to CO2, that clearly has not turned the whole thing into a net loss. Weighing the costs and benefits together there is simply no question fossil fuel use has served to benefit humanity greatly.