Question

why are landfills coming up fast near large cities

Answer 1

Landfills are when the waste or the garbage is being collected in a flat land possibly a barren one and covered with earth for it to decompose.  It is actually a very effective method of getting rid of waste.  Large cities mean more population.  More people mean more waste is produced and it needs to be collected and disposed.  Landfills fulfill this activity quite efficiently and this is why landfills come up fast near large cities.