The Mayor of London, Sadiq Kham, has published his Environment Strategy. The executive summary talks about the “greening” of London with more trees, green roofs and walls to reduce energy demand, the encouragement of more walking and cycling to improve air quality and many other environmental improvements. But the report fails to mention the key problem. Namely that there are too many people in London. It highlights that water supply is set to outstrip supply by 2020 and the city’s electricity infrastructure is approaching full capacity. Air pollution is also high but that’s not just from transport, albeit much of the transport emissions are generated by the goods vehicles and public transport vehicles required to serve the growing population. Non-road emissions such as from construction, the river or wood burning constitute half of emissions in London and are a growing issue – that’s what the Mayor says, but he has no solution to that other than to “work with the government and other partners”. London’s population is growing rapidly and the more people there are, and the more businesses that provide employment and services to those people, the more energy and water are consumed and the more emissions generated. It also results in a sclerotic road transport network where no new capacity has been added for many years. But instead of tackling the root cause of the problem the Mayor is talking about planting more trees and providing more open spaces. In summary, many of the Mayor’s proposals are worthy and may have minor impacts on the quality of life in London. Encouraging us all to drive zero emission electric vehicles by 2050 may help in some regards, although they will add a further heavy load on the already stretched electricity network, but the report fails to spot the elephant in the room and propose how to deal with it. Namely that there are too many people in too small an area of land. The densification of London, with more and more homes and other buildings to support the growing population, supported by a few more green parks will not tackle the fundamental problem.