Back in the 1960s and 1970s, the world was becoming more aware of the destructive effects of industry (26)______ the environment and people were starting to think seriously about ways of prot
Back in the 1960s and 1970s, the world was becoming more aware of the destructive effects of industry (26)______ the environment and people were starting to think seriously about ways of protecting the environment.
A. for
B. to
C. with
D. on