With climate change and energy demand on the rise, an understanding of the history and development of energy efficiency innovations is very important.

This timeline challenge takes you through the major milestones and breakthroughs in energy efficiency in general, but particularly in Europe. This illustrates how technological developments and changing policies have influenced existing practice and point the way to the future of energy saving.

You must drag and drop significant milestones in chronological order. Based on the information you have collected, decide on the correct order from oldest to newest innovations.

Are you able to solve this challenge?