Renewable energy is usually energy that gets collected from resources which are naturally replenished on a human timescale, like sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy frequently gives energy in four important areas: electricity generation, air and water heating/cooling, transportation, and rural off grid energy services.
depending on REN21's 2016 report, renewables contributed 19.2 to humans' world energy intake and 23.7 to their generation of electricity in 2014 and 2015, in that order. This energy intake is divided as 8.9 coming from conventional biomass, 4.2 as heat energy modern biomass, geothermal and solar heat, 3.9 hydro electricity and 2.2 is electricity from wind, solar, geothermal, and biomass. global investments in renewable technologies amounted to more than US$286 billion in 2015, with countries like China and the United States heavily investing in wind, hydro, solar and biofuels. Globally, there are an approximated 7.7 million jobs related with the renewable energy industries, with solar photovoltaics being the biggest renewable employer.
Renewable energy resources exist over large geographical regions, in contrast to other energy resources, which are concentrated in a restricted number of countries. fast deployment of renewable energy and energy efficiency is ensuing in important energy security, weather change mitigation, and economic benefits. The results of a recent review of the literature finished that as greenhouse gas GHG emitters begin to be held liable for damages as result of GHG emissions ensuing in weather change, a high value for liability mitigation could supply powerful incentives for deployment of renewable energy technologies. In international public opinion surveys there's strong support for promoting renewable resources like solar power and wind power. At the national level, at least 30 nations around the globe already have renewable energy contributing more than 20 of energy supply. National renewable energy markets are projected to continue to grow strongly in the coming decade and beyond. Some places and at least two countries, Iceland and Norway produce all their electricity using renewable energy already, and many other countries have the set a goal to reach 100 renewable energy at some point. as an example, in Denmark the government decided to switch the total energy supply electricity, mobility and heating/cooling to 100 renewable energy by 2050.
While many renewable energy projects are large scale, renewable technologies are suited to rural and remote regions and developing countries, where energy is frequently crucial in human development. United Nations' Secretary General Ban Ki moon has said that renewable energy has the capability to lift the poorest nations to new levels of successfulness. As most of renewables supply electricity, renewable energy deployment is frequently applied in conjunction with more electrification, which has some number of benefits: Electricity may be transformed to heat where needed generating higher temperatures than fossil fuels, may be transformed into mechanical energy with high efficiency and is clean at the point of intake. also to that electrification with renewable energy is more economical so leads to a important reduction in main energy prerequisites, because most renewables do not have a steam cycle with high losses fossil power plants typically have losses of 40 to 65.