Being environmentalists trying to reduce their greenhouse gas emissions in every sector of the economy Mats & Alexander are really worried that all the flying they are doing is simply cancelling out all the hard work they are doing with recycling, buying less stuff and eating less meat. How bad is flying for the climate? And could it be justified? Are some flights more valuable than others? And are there any technological fixes to the use of fossil fuels in the aviation industry? These questions are bounced back and forward over the globe in this Skype conversation, that in itself did not require any flying at all.