This video shows an amazing new type of light show at a recent Coldplay concert. Each audience member is given a wristband containing LEDs. These are controlled centrally so they light up in time to the music – a trully interactive experience. Each wristband has a receiver, which allows data to be sent via radiowaves […]

Global cement production accounts for about 2 billion tonnes of CO2 every year – that’s 5% of all CO2 emissions and more than the entire aviation industry. Now a company has come up with a way of producing cement actually reduces carbon dioxide emissions.