Shame there isn't a worldwide movement towards controlling and decreasing the world's population. "Efficiency" in this context refers to the efficiency with which we consume and refining that process provides no solution because it serves to accelerate population expansion. Its a zero-sum game.
that's ok because little Jimmy fuckface dyson will ride in on the second coming and he shall farm out the cyclonic flux capacitor flungdulator vacuum which can resurrect bunnies and baby foxes as it passes and generates ozone repair patches in its sanitary wake to save the planet. He will also incorporate Bootsams ant breath converter kettle within it so your perfect cuppa is ready when you've finished the hoovering (which it will have worked out already). I blame the stark corporation for not making the Arc reactor readily available.
or preliminary research maybe.....? Page 66 covers kettles - the report should prove suitably soporific tonight though! http://www.ecodesign-wp3.eu/sites/default/files/Ecodesign WP3_Draft_Task_3_report_11072014.pdf