McNickle v Huntsman Chemical Company Australia Pty Ltd (Initial Trial) [2024] FCA 807

McNickle v Huntsman Chemical Company Australia Pty Ltd (Initial Trial) [2024] FCA 807

The applicant did not prove, on the balance of probabilities, that use of or exposure to Roundup Products (glyphosate-containing herbicides) increased an individual's risk of developing non-Hodgkin lymphoma or caused NHL in humans during the relevant period. The totality of the scientific evidence—epidemiological, animal, and mechanistic—taken as a whole, does not establish general causation for NHL. The most comprehensive and reliable epidemiological evidence, particularly the Agricultural Health Study, showed no association. The applicant's scientific evidence was insufficiently strong, often confined to possibilities or theoretical mechanisms, and did not amount to legal proof of...

Parties
Applicant: Kelvin McNickle; First Respondent: Huntsman Chemical Company Australia Pty Ltd; Second Respondent: Monsanto Australia Pty Ltd; Third Respondent: Monsanto Company
Jurisdiction
Australia
Judgment Date
25 July 2024
Procedural Posture
Representative Proceedings (class Action) / Initial Trial of Common Questions (general Causation) Before Final Individual Issues
Outcome
Proceeded to determination of common question; claim for general causation dismissed. Final orders subject to resolution of costs.
Legal Topics
General Causation, Carcinogenicity, Epidemiology, Representative Proceedings, Expert Evidence, Evidence Assessment, Public Health Litigation
Torts Product Liability Civil Procedure Evidence General Causation Carcinogenicity Epidemiology Representative Proceedings +3 more

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Parties

Kelvin McNickle

Applicant

Huntsman Chemical Company Australia Pty Ltd

First Respondent

Monsanto Australia Pty Ltd

Second Respondent

Monsanto Company

Third Respondent

Procedural Posture

Representative Proceedings (class Action) / Initial Trial of Common Questions (general Causation) Before Final Individual Issues

Legal Issues

  1. 1 Whether use of or exposure to glyphosate-based Roundup products increased the risk of, or caused, non-Hodgkin lymphoma (NHL) in humans during the relevant period (July 1976–19 October 2020)
  2. 2 Proper approach to evidence and fact finding in complex scientific litigation
  3. 3 Whether the applicant established general causation on the balance of probabilities

Ratio Decidendi

The applicant did not prove, on the balance of probabilities, that use of or exposure to Roundup Products (glyphosate-containing herbicides) increased an individual's risk of developing non-Hodgkin lymphoma or caused NHL in humans during the relevant period. The totality of the scientific evidence—epidemiological, animal, and mechanistic—taken as a whole, does not establish general causation for NHL. The most comprehensive and reliable epidemiological evidence, particularly the Agricultural Health Study, showed no association. The applicant's scientific evidence was insufficiently strong, often confined to possibilities or theoretical mechanisms, and did not amount to legal proof of...

Court Disposition

Proceeded to determination of common question; claim for general causation dismissed. Final orders subject to resolution of costs.

Orders

  • Leave granted to amend group membership nunc pro tunc to reflect statement of claim prior to opt-out date (19 Oct 2020).
  • Central common question (whether Roundup Products increased risk of or caused NHL in humans) answered: not proven on the balance of probabilities.