What Birdmanthepuny means, is the Recycling Center improvement may not necessarily represent a recycling facility, but the recycling initiatives taken by the population, like cleaning out and re-using ZipLoc bags, and donating used footwear to charity. Little things that reduce the quantity of garbage produced.
It is fascinating that you should describe landfills as environmentally beneficial. Yes, you can put a golf course on the site, but only after capping the mountain of garbage. Besides, since golf courses conflict with the natural landscape, it could be argued that golf courses are environmentally damaging.
The only feasable reason for the continued existance of landfills is because they're so cheap. The hills of waste never seem to shrink, and by the time workers may move the trash to another site, damaging chemicals will have already seeped into the underlying soil, making it unfit for habitation for many years. It is for this reason that alternative methods for waste management are researched. True, recycling plants do pollute, but at least they don't scar the planet.