Why are Bio-Fuels used for Generating Electricity, is there any Cons and Pros?

P: Its a Renewable Source, its Unlimited P: They are Carbon Neutral, It needs to have the Same Rate Growing of Plants and Trees to Burning Plant Materials P: Its Reliable, as the Crops can grow Quickly C: Its not very Flexible to Energy Demands, as Crops take Time C: Its Expensive and also Bio-Fuels may use up Resources, Food and Water C: Deforestation may also Occur in order to grow Bio-Fuels, which means its Indirectly Impacting the Environment