BBC: Getting back to the relatively slim, trim days of the 1970s would help to tackle climate change, researchers say. The rising numbers of people who are overweight and obese in the UK means the nation uses 19% more food than 40 years ago, a study suggests. That could equate to an extra 60 mega tonnes of greenhouse gas emissions a year, the team calculated. Transport costs of a fatter population were also included in the International Journal of Epidemiology …