**1.7 Why is glyphosate application on field sites a concern?**

The International Agency for Research on Cancer (IARC) has reclassified that glyphosate is "probably carcinogenic to humans" [30]; however, the United States Environment Protection Agency (US EPA) concluded that there is no convincing evidence that "glyphosate induces mutations" [31]. The US EPA relied mostly on unpublished regulatory studies, 99% of which were negative, while IARC relied mostly on peer-reviewed studies, 70% of which were positive [31]. Glyphosatebased herbicides often contaminate drinking water sources, air, and precipitation in agricultural regions [30]. As the usage of glyphosate-based herbicides continues to increase, investment in epidemiological studies, biomonitoring, and toxicology studies based on the principles of endocrinology should be done [30]. Apart from cancer, glyphosate has been found to be a potential factor causing chronic kidney disease due to drinking water faced by Sri Lankan farmers [32]. The role of drinking water has also been reported in another study which caused ill health in Indian farmers [33].
