Renewable energy refers to energy derived from naturally replenished sources such as solar, wind, and hydropower. In the provided context, it is presented as the central pillar of the energy transition needed to mitigate climate change. A key scenario described is the near-complete decarbonization of the power sector by around 2050, with a growing share of final energy demand supplied by electricity. Renewable energy, especially solar and wind power, is said to be reshaping the global electricity system. By 2023, more than 30% of global electricity generation came from renewable sources, a record high, and renewables including hydropower accounted for roughly one-third of electricity supply.
The context emphasizes that the rapid expansion of renewable energy has been driven by falling costs, large-scale deployment, and improvements in related technologies. Battery storage is becoming increasingly important because solar and wind output varies with weather and time of day. To support high shares of renewables, the passages mention combinations of batteries, long-duration storage, hydrogen, demand response, and cross-border grid integration. Renewable electricity is also linked to the production of green hydrogen and synthetic fuels for sectors that are difficult to electrify, such as aviation, shipping, steel, and chemicals.
At the same time, the text notes that the main barriers are not technical feasibility but policy, investment, and infrastructure. Expanding transmission networks, supporting storage deployment, and coordinating industrial transition are all described as necessary for large-scale adoption.