pollution and climate change on the other. Over millennia humans have utilized various fuels, some of which are available only in limited supply: our oil reserves will be depleted in a few decades, while plants and trees, geothermal energy, hydroelectric power and solar power are renewable sources that do not harm the climate. Projects that involve energy production, the use of renewable fuels, energy distribution and transport, energy utilization, and energy optimization and thereby achieve optimized efficiency and sustainability can be submitted in this category.