With the UK currently set to crash out of the European Union on 31 October, Britons are particularly worried about their food supplies .

Every year the EU produces around 15 million tonnes of bitumen . Most of this is mixed with aggregates such as crushed rock, sand and gravel to create asphalt – the sticky bitumen binds it all together – to build roads.

Skiing has been around for at least eight millennia. Skis from 6000 BCE have been found in northern Russia , while 5000-year-old cave paintings in China appear to show people skiing .

Bio-composites have become increasingly popular with car manufacturers because they can reduce vehicle weight, which improves performance and lowers CO 2 emissions .

In recent years, plastic pollution has hit the headlines as a major environmental issue. While gardening is an outdoor activity involving organic material and natural products, the uncomfortable truth is that gardeners use a lot of plastic .

Researchers in the US have developed bio-based air filters that they claim can capture toxic chemicals that current filters can’t.

A significant proportion of food waste is dairy. WRAP, a UK charity that helps individuals and organisations reduce waste, says that 20% of the estimated 1.