Costa Coffee and Greggs are taking part in the Too Good To Go initiatives. This is a free app that allows customers to purchase unsold food from top eateries at the end of service, to prevent it from being thrown away. This means people get high-quality food at a great price and do some good for the planet. By saving that food from ending up in landfills, it prevents the CO2 to be released when it decomposes, since 8% of all greenhouse gas emissions come from food waste.