grid.arrange(p1, p2, p3, p4, top = "Average pollutant levels (2000 - 2016)")
unnamed-chunk-2

unnamed-chunk-2

so2state
unnamed-chunk-4

unnamed-chunk-4

grid.arrange(drought.map1, poverty.map1, top = "")
unnamed-chunk-7

unnamed-chunk-7

i
unnamed-chunk-9

unnamed-chunk-9