Taxes and subsides work together by [ Select ] the price of polluting technology or goods and [ Select ] the price of competing clean technology or goods. Over time, as firms and individuals choose the [ Select ] cost technologies or goods, products that bear a [ Select ] will phase out of the market, while products with a [ Select ] will be adopted. As the scale of production of non-polluting technologies increases, the cost of production for those technologies or goods will [ Select ] , further reducing the [ Select ] until subsidies are no longer necessary to successfully compete with the polluting technologies or goods