FOEN, Analysis and evaluation of Swiss data collected for the 2nd OECD Survey on Environmental Policy for Individual Behavior-Change, 2015-11, p. 40 ([Internet, 2020-02-07](https://www.bafu.admin.ch/dam/bafu/en/dokumente/wirtschaft-konsum/externe-studien-berichte/analysis_and_evaluationofswissdatacollectedforthe2ndoecdsurveyon.pdf.download.pdf/analysis_and_evaluationofswissdatacollectedforthe2ndoecdsurveyon.pdf))