Now they want CLIMATE CHANGE warnings on fast food menus
Labels warning you a fast food burger is bad for your health should be joined by one alerting you that your choice is killing the planet as well, scientists say. A group of American researchers Showing participants a red environmental impact stamp on beef items led to almost a quarter more people shying away from them, compared to those who didn't see the warning. Environmental guilt was more effective than a green 'good for the planet' label, which only encouraged a tenth more people to choose a more sustainable meal. British consumers are already used to traffic-light food labels with amber and red colours warning that an item contains a higher than recommended amount of fat, sugar or salt. But now a group of US researchers have tested adding a similar system for how much a meal contributes to climate change to encourage diners to make more sustainable choices. In their study, published in , they argue such a system could have merits because animal-based food production, mostly through beef, accounts for 14.5 per cent of global greenhouse gas emissions. To test how effective this would be, they enrolled just over 5,000 people in an experiment, with participants puit into three groups and shown a fast food menu. These menus were identical except for their labelling system, with participants told to order one of the 14 hypothetical food items. One group, acting as the control, featured a simple QR code next to each menu option. The second had a green footprint next to non-beef items like chicken, fish, and salads, with text that read: 'This item is environmentally sustainable. It has low greenhouse gas emissions and a low contribution to climate change.' This was a positive labelling system, one that theoretically encourages people to make a more sustainable choice. In contrast, the final menu was a negative labelling system, featuring a red footprint accompanied by text stating: 'This item is not environmentally sustainable. It has high greenhouse gas emissions and a high contribution to climate change.' This was designed to discourage diners from ordering an item bad for the planet. Comparing results across the groups they found red labels were the most effective, with 23.5 per cent more diners in this group choosing a non-beef item compared to the control group. Diners exposed to the green labels also made a more sustainable choice, but the impact was smaller. Only 10 per cent more people in this group chose a sustainable option, compared to those who used the control menu. Lead author of the study Professor Julia Wolfson, an expert in food policy at Johns Hopkins Bloomberg School of Public Health in Baltimore, said the results showed the effectiveness of the red negative-style warning labels. 'We found that labelling red meat items with negatively framed, red highclimate impact labels was more effective at increasing sustainable selections than labelling nonred meat items with positively framed, green lowclimate impact labels,' she said. Professor Wolfson added that another downside to the green positive style labels was revealed in a survey participants filled out after making a selection. Diners were asked to score their meal selection out of seven points for how healthy it was. The results showed those in the green label group who selected a good for the planet option were more likely than the control group to score their meal healthier. This was despite none of the fast food menu items actually being healthy. Professor Wolfson said this was an example of a 'health halo' effect, where a positive aspect of a food item, in this case sustainability, made it appear overall healthier than it actually was. She added that despite the effectiveness of the negative system most of the food industry wouldn't want to use it, meaning governments would need to enforce it through law. 'It is unlikely that industry would voluntarily adopt a negatively framed label approach; such an approach may need to be mandated or incentivised via legislation or regulation,' she said. The authors acknowledged that their study had several limitations. One was that the experiment was held online with people viewing hypothetical menu items, and their choices in real-world study could be different. Another was that the menu did not include any side dishes or beverages with the authors stating a similar study exploring the impact of climate change labels on full meals with an overall cost could be an area for further research. This isn't the first time scientists have proposed adding environmental labels to food and drink. Just last month, the London-based Institute of Alcohol Studies argued wine and beer should have labels Beef is considered one of the least climate change friendly foods due to the impact cattle have on the environment. This is due to the methane the livestock produce while digesting plant matter and the environmental cost of creating land for grazing and growing food to feed cattle. Doctors call for sugar and salt limits in baby food as they warn Table for one? Once a month jab could ease pain of arthritic knees: