This purposive study was undertaken to examine the factors associated with farmers' awareness on environmental hazards caused by rice monoculture and ascertain the factors contribute to their awareness. Char ishardia village of Mymensingh sadar upazila and Tulatuli village of Sonagazi upazila, Feni were purposively selected as traditional and progressive village respectively. Data were collected from the randomly selected sample e.g. 96 farmers 48 form each village using a pre-tested structured interview schedule during March and July 2003. About half (54percent) of the respondents had high awareness on environmental hazards of rice monoculture compared to 30 percent low awareness. Farmers of progressive village had more average level of education, family size, training exposure, knowledge of diversified crop cultivation, cosmopoliteness, extension media contact, and innovativeness than those of traditional village. Out of ten selected characteristics, level of education, knowledge of diversified crop cultivation, cosmopoliteness and innovativeness were positively related with the awareness while family size was negatively related. Three factors namely knowledge of diversified crop cultivation, family size and level of education contributed significantly to the farmers' awareness considering both the villages while innovativeness together _with the former two factors mentioned contributed to the awareness considering progressive village. On the other hand, only two factors such as knowledge of diversified"crop cultivation and level of education contributed in predicting awareness of the farmers of traditional village.