Environment

Properties

Environment(Agent Properties)

environment.py

class Environment(mesa.Agent) -> None:
    """The Environment agent."""

    def __init__(self, unique_id, model):
        super().__init__(unique_id, model)
        
        self.breed = "Environment"
        self.period = 0 # Model run step.
        
        # See https://en.wikipedia.org/wiki/Names_of_large_numbers
        # (10^21) One sextillion units of available (stock) fossil hydrocarbon energy.
        self.units_stock_energy = Decimal(1000_000_000_000_000_000_000)

        # Stock energy geopolitics:
        # The 'ase' relates to the availability of stock (fossil hydrocarbon) energy.
        # A number; from least to most available: 0.01 >= 'ase' <= 1.0.
        self.availability_stock_energy = Decimal(1)

        # Environment (Negative Externality):
        self.cumulative_neg_externality = Decimal(0) # Use of stock energy.
        # 3% of stock energy is environmental negative externality.
        self.cumulative_neg_externality_rate = Decimal(0.03)

        # Start with an amount of renewable energy (units).
        self.flow_energy_base = Decimal(5)

        # Units of available (stored) renewable energy.
        self.units_flow_energy = Decimal(0)

Behaviour Comments

Environment(Agent Comments)

environment.py

def step(self):
    """
    Functions (each and every step):
    1. Add newly generated (renewable) energy to the mix.
    """

    # See https://www.statista.com/outlook/io/energy/renewable-energy/worldwide
    growth_flow_energy = Decimal(0.0388) # 3.88%

    # Add newly generated (renewable / flow) energy.
    self.units_flow_energy += self.flow_energy_base
    self.flow_energy_base = (self.flow_energy_base + (self.flow_energy_base
                                                      * growth_flow_energy))