BBC Radio 4 - Sliced Bread, Sliced Bread - Series 3

Carbon Negative and Carbon Offsetting

Brands are planting forests to offset their carbon emissions, but how effective is it?

Can a liquid lunch be good for you?

The latest electric toothbrushes promise you a ‘professional clean’, but do they deliver?

Are claims that they can protect our eyes and improve sleep true? Or just short sighted?

Are personalised vitamins a health win or just a bitter pill to swallow?

Is it worth paying more for a pair? Will they make you run faster?

Can every home have an air source heat pump? Or is that claim a load of hot air?

Are they marketing sizzle, or steak?

What makes them more sustainable? Do they last longer? Greg puts them to the test.

Greg Foot asks whether electric vehicles really are the best thing since sliced bread.