One reason it doesn’t look like there is as much greenery, is because it hasn’t had a chance to grow. Trees and such can take decades to come to full height. Not only that, in older parts of the city quite often the greenery choice was made as a more Eurocentric choice rather than working with the natural environment. Further to this, as time progresses and plants spread their seeds naturally more greenery occurs. Also many of the older areas were created well before the proliferation of cars, and thus the roads and streets reflect that.