The Baltic Sea experiences the explosion of potentially toxic cyanobacteria blooms every spring and summer; the warm weather augments the formation of cyanobacteria
contributing to which has been fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals.
A. contributing to which has been fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals
B. with fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals having been contributing to it
C. and, in addition, fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals have contributed
D. to which contributes fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals
E. to which fertilizer and animal waste from farms and pastures, effluent from towns, cities, and industrial facilities, and pesticides and other chemicals contribute