Long term Emission optimization

Respected Forum

I am a new used of GAMS who is in need of help, i want to optimize emissions produced by a certain power generation sector and i have made a model for it on paper, a few issues remain, i would be really grateful if anyone could reply to my queries as i am desperately in need of help:

  1. How can i define the incremental increase of a certain parameter for a few years
  2. Does this increasing function relate to any formule that is used later in the code
  3. If i define Demand as the increasing parameter and my objective function consists of different emission types, would the optimization provide me with the percentages of the fuels that i can use, provided i have mentioned the fuel and its emissioms in the equation section?

I would be really grateful for a quick reply