German Chancellor Angela Merkel has warned that time is running out for a deal to keep Greece in the Eurozone. Speaking after the G7 summit in Germany, she said Europe would show solidarity but only if Greece ‘makes proposals and implements reforms’. Also on the agenda was climate change, with the G7 calling for a transformation of electricity generation towards renewables and nuclear power by 2050; they also said that fossil fuel should not be burned in any sector of the economy by the end of the century. This is a seismic shift, but huge questions remain. On the Ukraine the G7 hoped Russia would comply with a ceasefire agreement signed in February by pro-Moscow rebels and the Kiev government. But sanctions could be strengthened if necessary. Barack Obama echoed Mrs Merkel’s comments, saying, ‘The G7 is making it clear that if necessary we stand ready to impose additional significant sanctions against Russia.'