The aviation industry is responsible for 2 percent of global carbon dioxide emissions, twelve percent of emissions from transport, and is one of the most carbon-intensive activities any individual can participate in. For all of these reasons, the race to make air travel carbon-neutral has become a central focus of governments and researchers who are determined to reduce the impact of greenhouse gasses on our environment. From electric planes to biofuels and hydrogen energy, there are plenty of new and exciting technologies in this space, but achieving parity with jet fuels in either cost or energy density is a formidable challenge. Take electric planes , for example, the size and weight of the batteries required to get a plane off the ground mean that the most promising projects vary from carrying 2 to 9 passengers. Then there’s biofuel, currently the most popular and commonly used of the ‘carbon neutral’ […]