NATO has shown its robust determination to help Ukraine defend itself against Russia’s invasion but ensuring it has the latest technologies to tackle climate change presents another challenge for to the 30-nation alliance.“We're now confronted with a Russian invasion of Ukraine, so a large-scale conflict on European soil that many would have thought unthinkable a few years ago,” David van Weel, NATO’s Assistant Secretary-General for Emerging Security Challenges, told Euronews Next.But the key to all these technologies, van Weel said, is start-ups so the alliance can “make sure that we have the most novel technologies at our disposal to defend our 1 billion citizens”.“A lot of times, the military doesn't know what new technologies are around the corner and a lot of the innovators don't know what is needed in a military context,” he said, adding that bridging the gap is NATO’s first priority.US President Joe Biden warned that since Russia's invasion the risk of a nuclear "Armageddon" is at its highest level for 60 years."