我国人多地少,北京作为一个特大城市,人地矛盾尤为突出。近年,随着北京市城市绿化建设的全面推进,城市绿化有了很大的发展。但是与国内外很多城市相比,北京市绿地系统在数量、布局、规划等方面有待改善和提升。同样作为国际化大都市的伦敦,经济发达,人口密集,土地珍贵,曾是一个污染严重的城市,如今却以其完备的绿地系统和优美的城市景观闻名于世, There are few people in our country. Beijing, as a megacity, is particularly contradictory. In recent years, with the overall urban greening construction in Beijing, there has been a great development in urban greening. However, compared with many cities at home and abroad, the green space system in Beijing needs to be improved and upgraded in quantity, layout and planning. London, also an international metropolis, is an economically developed, densely populated and prized land that used to be a heavily polluted city and now known for its well-developed green spaces and beautiful urban landscapes,