1. Rock science De Beers will for the first time sell jewellery with diamonds that have been made in a laboratory, at a fraction of the price of mined gems. Man-made diamonds, which are preferred because of environmental and ethical concerns, are made from a carbon seed that is placed inside a microwave chamber and then superheated to become a glowing plasma ball. The process makes particles that can crystallise into diamonds in 10 weeks.

2. Woolies’ plastic plan Woolworths is planning to be SA’s first retailer to contribute zero packaging waste. The retailer says its aim is to have none of its packaging end up in landfills, which will require the introduction of 100% recyclable materials and a supportive recycling infrastructure. This includes a plan to phase out single-use plastic shopping bags by 2020. Companies around the world are under pressure to reduce the environmental damage caused by plastic...

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