The brand with the four rings is unveiling its concept car Audi h-tron quattro concept at the NAIAS 2016 in Detroit – a sporty SUV that uses hydrogen as its energy source. The concept car combines a highly efficient fuel cell achieving an output of up to 110 kW with a battery that provides a temporary boost of 100 kW. Audi’s fuel cell technology paves the way for sustainable mobility with the sporty performance for which the brand is…