Germany’s Social Democrat (SPD) Environment Minister Svenja Schulze presented three independent studies on possible carbon tax schemes in Berlin on Friday. Insisting such a tax would not unduly burden the poor, she said, “those who decide to live a more climate-friendly life could actually get money back.” The plans Schulze presented suggested an initial €35 ($39.50) tax on each metric ton of CO2, to be increased to €180 by 2030, the idea being that the more expensive petrol, natural gas, and heating oil become, the less people will use. Schulze told reporters that those who consume less, including children, will...