How environmental warning labels at gas pumps could change our ... But there, gas pumps will feature warming labels - officially, "climate impact and origins of all fuels" labels - starting next year, thanks to legislation championed by Parliament Member Karolina Skog and the Swedish Association of Green Motorists. According to Skog, the legislation succeeded because people yearn to better understand gasoline's initially-invisible externalities that, in the future, will come back to harm people who use the product.