and utilised and with rapid growth of renewable energy beginning to back out but it s still the case that fossil energy accounts for 85% of the worlds energy mix and the fuel that runs economies gets the kids to school, cooks these food, heat homes, largely comes from fossil energy sources and no getting around that in the short term. no getting around that in the short term- short term. thank you for “oininu short term. thank you for joining us- after days of being shelled, thousands of ukrainians and international students from the city of sumy, in the north east of the country, have been able to escape after a russian ceasefire was put in place. our eastern europe correspondent, sarah rainsford, is in poltava, where people have been arriving from sumy. it must have felt like the longest ride of their lives. 12 hours to escape a besieged city, driven the long route