After three flat years that had hinted at a possible environmental breakthrough, carbon dioxide emissions from the use of energy rose again by 1.4 percent in 2017, according to new data released by the International Energy Agency on Wednesday. The increase in emissions of the all-important greenhouse gas came as global energy demand itself increased thanks to strong economic growth — and that demand was sated by all types of energy, including renewables but also oil, coal and natural gas. “The growth in energy-related carbon dioxide emissions in 2017 is a strong warning for global efforts to combat climate change, and demonstrates that current efforts are insufficient to meet the objectives of the Paris Agreement,” the IEA said.