economy_industries = []
accepted_by = self.industry_find_industries_active_in_economy_for_cargo(cargo, economy, 'accept_cargo_types')
produced_by = self.industry_find_industries_active_in_economy_for_cargo(cargo, economy, 'prod_cargo_types')
for industry in accepted_by:
economy_industries.append(industry)
for industry in produced_by:
economy_industries.append(industry)
accepted_by = self.industry_find_industries_active_in_economy_for_cargo(cargo, economy, 'accept_cargo_types')
produced_by = self.industry_find_industries_active_in_economy_for_cargo(cargo, economy, 'prod_cargo_types')
economy_industries = accepted_by + produced_by