anniversary, world trends, resource-innovative development, concentration of solar radiation, energy supply, world population, photoelectric converters, geography, oceanology, Moscow State University, personalities, world GDP, new challenges, photovoltaic power plants, national projects, renewable energy sources, technologies, people, energy supply structure, A.A. Solovyev, mathematics, pandemic, obituary, modeling, XXI century energy outlook, regions of the world, catastrophes, space photovoltaic, cyclical economy, thermodynamics solar power, Solar power, photoelectric modules, electricity production, production, resources, solar activity, ground-based FES, environment, mechanics, energy, RAS