Which of the following are natural causes of acid rain? a) volcano emissions, lightning, and microbial processesb) industrial emissions and other man-made pollutersc) smokestacks and volcano emissions d) microbial processes and fuel combustionthe answer was "a"

Idont know i wonder tthough seems like it will be intristing

Conflicts arising from drug cartels and goverment corruption is an issue that would most likely be considered as mexico's most challenging problem of today. the correct option among all the options that are given in the question is the third option or option "c". this problem has continued for a very long time.