SO-CALLED "environmentally responsible" food purchases need to be based on sound science rather than merely perception as work out of Washington State University has shown that those foods consumers tend to think are "intuitively correct" may indeed be the least environmentally friendly option.
Dr Jude Capper, assistant professor of dairy sciences at Washington State University, believes the food industry should use a whole-system approach and assess environmental impact per gallon of milk, pound of beef or dozen eggs, not per farm or per acre.
She calls it a "lifecycle assessment" approach, which evaluates all inputs and outputs within the food production system and allows for correct comparisons of different production systems.
"Consumer demand for milk, meat and eggs is going to increase as the population continues to grow," Capper said. "Therefore, the vital role of improved productivity and efficiency in reducing environmental impact must be conveyed to government, food retailers and consumers."
Intuitively, today's modern production practices often seem to have a higher environmental...