Paths and suggestions of green and low-carbon development in small towns Study on Shanghai's green and low-carbon development path Study on strategic choice of green and low-carbon development for coal enterprises 并列题名：Study on strategic choice of green and low-carbon development for coal enterprises CO2 emissions and low carbon development in China Research on the digitalization, green and low-carbon development of the economy Research and practice on green and low-carbon development path of transportation industry 并列题名：Study on Shanghai's green and low-carbon development path