Between 2000 and 2018 the number of people with access to electricity increased from 78 to 90 per cent and the number without electricidy decreased to 798 million. Nowadays one out of ten people still lack electricity; morhe than half live in Sub saharan Africa.
Yet  the global population continues to grow and so will the demand for cheap enery and an economy based simply on fossil fuels is creating big problems and climate change.
The central issue surrounding our energy crisis revolves around the concern that the world’s demand for natural resources is greater than the supply that we have. It takes hundreds of thousands of years to replenish (rifornire) the supply of fossil fuels we have been using to power our cars, charge our phones, and light up our cities. 
We use fossil fuels, such as coal, oil, or gas, through combustion to make power. At the same time, this combustion process generates large amounts of greenhouse gases and other kinds of pollution.  By-products of energy use like CO2, oil spills and greenhouse gases accelerate climate change and impact the well-being of our planet and its population. If we don’t develop and use a sustainable e energy supply, countries will not be able to power their economies.
The solution we have are renewable resources.  Renewable resources are derived from resources that can be replenished sustainably and with less negative environmental impacts, such as hydro, solid and liquid biofuels, wind, sun, geothermal and marine sources.
 A non-renewable resource is a resource that cannot be readily replaced by natural means on a level equal to its consumption. Fossil fuels like oil, natural gas, and coal are not sustainable because they take billions of years to make. 
Our global total renewable energy consumption has increased slowly, from 17.4 per cent in 2000 to 18.1 per cent in 2012. It grew rapidly, at a rate of 4 per cent a year between 2010 and 2012, and accounted for 60 per cent of all new power-generating capacity in 2014.1

AFFORDABLE AND CLEAN ENERGY