Alongside the ecology of nature, there exists what can be called a “human” ecology, which in turn demands a “social” ecology. All this means that humanity, if it truly desires peace, must be increasingly conscious of the links between natural ecology, or respect for nature, and human ecology. Experience shows that disregard for the environment always harms human coexistence, and vice versa. It becomes more and more evident that there is an inseparable link between peace with creation and peace among men.
(His Holiness' italics.)
The closest I've ever come to Catholicism was an ex-girlfriend, but I like that. A lot.