As an environmental consultant, your role is to provide guidelines and information on issues related to the impact of the current or existing transportation systems of the Greater London region, on the environment, and the local population, in particular. You are presently advising on the replacement of the current transport system. Analyse and discuss how these impacts can be prevented, if not, minimised. At the same time, discuss the most efficient approach in implementing renewable energy systems such as biofuel production and electricity generation that might be used for a new transport system. The new system should confirm to sustainability in relation to economic, social, and environmental issues. By doing so, you may need to establish a monitoring scheme and an enforcement programme.