That was among the latest ideas suggested in a proposed study that would search for a link between the landfill's contaminants and high rates of illness around it.
The proposal study would search for a link between illness and landfill contamination 
mnli hypothesis: The proposal study would search for a link between illness and landfill contamination  premise: That was among the latest ideas suggested in a proposed study that would search for a link between the landfill's contaminants and high rates of illness around it.