Based on the annual U.N. report, coca cultivation in Colombia expanded the most in border parts, the place cocaine is a snap to transport and export, specially the province of Putumayo, along Colombia’s southern border with Ecuador.Ex?l??n?ng th?t there ?r? l?m?t? to wh?t th? Andean governments ??n d? if ?????n? ??n?um?t??n carries on un?b?t?d, a