In order to achieve sustainability of our environment, several factors must be considered. which is not a factor to achieve successful environmental sustainability? a) a city's local government launches a program to reduce automobile use b) the population of migratory birds is affected by the use of wind turbines c) human population growth is expected to increase to almost 10 billion by the year 2050 d) policies are being put in place to replace non-renewable energy with renewable forms of energy