A well researched article but please look at the paper below and the link to 179 more papers. It seems to me there is possibly a great risk so we as a society should be cautious until we know the effects for sure. Rates of birth defects (major damage) with high exposure suggests a proportionally lower yet unacceptable damage with lower exposure too. Surely?

Abstract Title:
Exposure to pesticides as risk factor for non-Hodgkin's lymphoma and hairy cell leukemia: pooled analysis of two Swedish case-control studies.

Abstract Source:
Leuk Lymphoma. 2002 May;43(5):1043-9. PMID: 12148884

Abstract Author(s):
Lennart Hardell, Mikael Eriksson, Marie Nordstrom

Article Affiliation:
Department of Oncology, Orebro University Hospital, Sweden. [email protected]

Abstract:
Increased risk for non-Hodgkin's lymphoma (NHL) following exposure to certain pesticides has previously been reported. To further elucidate the importance of phenoxyacetic acids and other pesticides in the etiology of NHL a pooled analysis was performed on two case-control studies, one on NHL and another on hairy cell leukemia (HCL), a rare subtype of NHL. The studies were population based with cases identified from cancer registry and controls from population registry. Data assessment was ascertained by questionnaires supplemented over the telephone by specially trained interviewers. The pooled analysis of NHL and HCL was based on 515 cases and 1141 controls. Increased risks in univariate analysis were found for subjects exposed to herbicides (OR 1.75, CI 95% 1.26-2.42), insecticides (OR 1.43, CI 95% 1.08-1.87), fungicides (OR 3.11, CI 95% 1.56-6.27) and impregnating agents (OR 1.48, CI 95% 1.11-1.96). Among herbicides, significant associations were found for glyphosate (OR 3.04, CI 95% 1.08-8.52) and 4-chloro-2-methyl phenoxyacetic acid (MCPA) (OR 2.62, CI 95% 1.40-4.88). For several categories of pesticides the highest risk was found for exposure during the latest decades before diagnosis. However, in multivariate analyses the only significantly increased risk was for a heterogeneous category of other herbicides than above.

Article Published Date : May 01, 2002
Study Type : Human Study
Additional Links
Diseases : Hairy Leukoplakia : CK(10) : AC(2), Lymphoma : CK(253) : AC(83), Lymphoma: Non-Hodgkin : CK(363) : AC(79)
Problem Substances : Glyphosate : CK(502) : AC(160), Roundup (herbicide) : CK(502) : AC(160)
Adverse Pharmacological Actions : Carcinogen : CK(59) : AC(11)

179 more studies studies here showing glyphosphate damage.
http://www.greenmedinfo.com/toxic-ingredient/glyphosate