EasyJet has announced it will trial the use of hydrogen fuel cells on their planes to save a potential 50,000 tons of fuel and corresponding CO2 emissions each year. The hydrogen fuel cells aren’t the alternative to jet fuel, but will rather capture energy from when the plane brakes. That energy can be stored in the system’s lightweight batteries and can be used to taxi the plane to and from the runway without using any fuel. Around 4% of easyJet’s total fuel consumption is used during taxiing meaning the hydrogen fuel cells can save a vast amount of a fuel each year and will help EasyJet achieve its goal of cutting 7% in its CO2 emissions by 2020. If successful, we may be seeing the technology in more airlines in the near future.