The contribution of natural gas to the reduction of emissions to the atmosphere in Spain

The objective of this book is to analyze the impact of pollutants in the atmosphere on the air quality of cities in Spain and the consequences of greenhouse gas emissions, the main cause of climate change, in the energy scenario of 2006 and futures, under two premises: the presence of natural gas as an energy source or its absence.

What would happen to the emissions if there was no natural gas in Spain?