The Surprising Places We Waste Energy

'In Joe Hanson’s third episode of It’s Okay to Be Smart’s energy series, he explores the surprising places that we can be more energy efficient: Food waste, water waste, fertilizer waste, food transportation, gasoline consumption for powering cars, planes, trains, or ships… the list goes on.' source

This video not only deals with science and the environment, it also features many opportunities to link with maths - namely fractions, percentages and measurement.