you could change your manufacturing process, how you transport goods or even move factories, but all of these are big things to do, so you really need to know which is going to work best. how do you do it? answer — get yourself a digitaltwin! you make a virtual copy of your entire business and try stuff out in that first. alasdair keane's been to see the makers of dettol, who are trying to assess whether they can make their new products more sustainable or not. we use these kinds of products every day, from cleaning tabletops to personal hygiene and health. these brands are made by one company, called reckitt, and the industry to get them from factories to our homes is fast—moving and comes with a big impact on the planet. not huge, but important that we look at that carbon footprint and think how are we going to reduce it, decarbonise it? the product carbon footprint — that's everything from the raw materials all the way