it is by far the biggest search engine in the world , with nine out of ten internet searches. the company says one of its goals is to use its position to. build tools that enable travellers and businesses around the world to prioritise sustainably. that s from the chief sustainability 0fficer. it offers to calculate the climate impact of our flights, but that calculation has change. look at this. the red bar shows before the change and the blue bar after. the impact has almost halved, according to google. why? carbon dioxide isn t the only way flying warms the climate. those high clouds that our craft lead in their wake can have a powerful warming effect as well, for example, and there are other warming impacts. working out these non c02 factors is complicated and uncertain, but here is what the uk government suggest you should do. take the co2 emissions,