Electricity powers modern life and is central to the clean energy transition. Balancing rapid growth in demand from electrification and digital infrastructure with the need for decarbonization, affordability, and access is a defining challenge.
The coal power plant industry’s state is reflected in cancellations and shelved projects, concentrated in Asia (e.g., China, India). China’s paradoxical coal investment includes building new capacity and decommissioning old plants due to renewable energy growth. In the U.S., 23% of coal capacity will retire by 2029 due to competition from natural gas and renewables.
Since the 1920s, natural gas-fueled power plants grew gradually. After WWII, advancements in technology and fracking increased US electricity generated by natural gas from 16% in 2000 to 38% in 2021.
Waste-to-energy (WTE) plants in the US burn municipal solid waste to generate electricity, contributing less than one percent of the total. Initially developed due to landfill space scarcity, the renewable classification is disputed due to non-biogenic waste. Few new facilities have been built since the 1990s due to opposition, high costs, and increased focus on recycling and waste reduction.
Hydropower, a pioneer in grid-scale electricity generation since the late 19th century, now provides 17% of global electricity, surpassing nuclear, wind, solar, bioenergy, and geothermal combined. While the US and Europe have well-established capacity with limited room for expansion, China, India, Africa, and South America are developing new projects to meet rising electricity demand and reduce greenhouse gas emissions.
Hydropower plants utilize different technologies to generate electricity. Impoundment facilities use a dam to create a reservoir, releasing water through turbines. Run-of-river plants channel river water to generate power while pumped storage hydropower stores energy by moving water between reservoirs of different elevations. Each technology has its advantages and impacts on the environment and infrastructure.
© 2024 VisualizingEnergy. All Rights Reserved
License: Unless otherwise noted, all visualizations, data, and stories produced by Visualizing Energy are open access under the Creative Commons Attribution 4.0 International (CC BY 4.0). This means that you have permission to copy, transform, and redistribute the material in any medium, provided the source and authors are credited.
© 2025 VisualizingEnergy.
All Rights Reserved