Will flying cars become a widespread mode of individual transportation before 2032?

If sustainable aviation fuels take off, which type of fuel will be most widely used?

What decade will US air travel be more than 50% sustainably fueled? Hydrogen/renewable fuels/electric

What power source will replace diesel for long-haul trucking by 2030?

What proportion new car/suv/light truck sales will be hydrogen powered in 2030?

Will the majority of new passenger aircraft sold in 2050 be hydrogen fueled?

Will hydrogen cars be more popular than electric cars in 2030 in the first world?

Which of the following "colors" of hydrogen will be the cheapest by 2030? [details in description]

Will humanity get its hydrocarbon energy via solar-powered hydrocarbon synthesis in the next 20 years (ie by 2035)

Will China be the leading producer of green hydrogen in 2030?