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 capacity factor is a crucial measure for electricity generation. It represents the ratio of actual electrical energy production to the maximum possible output over a specific period. Nuclear plants lead with a 90%+ factor, while renewable sources like wind and solar struggle due to intermittency. New challenges arise with climate change impacting demand and production patterns.
Biomass generates electricity, or biopower, from sources like wood, agricultural residues, and urban waste. In the US, it accounts for 1.2% of electricity.
The United Nations’ 17 Sustainable Development Goals (SDGs) include SDG7, which aims to ensure affordable and sustainable energy for all. The share of global population with access to electricity has increased to 90% in 2022, yet around 800 million people are still without access, mostly in sub-Saharan Africa. Various factors influence access to electricity, impacting income and well-being.
Coal played a significant role in the US, generating half of the nation’s electricity in 1920 and maintaining that share for decades. However, aging coal plants are being retired due to competition from efficient natural gas and renewable energy sources, as well as state climate policies. This shift reflects growing concerns about cost and carbon emissions.
In the United States, geothermal power plants are predominantly located in six western states due to significant tectonic activity. In 2022, California housed 72% of this capacity, generating 6% of its electricity from geothermal power. The Geysers project in northern California is the world’s largest geothermal array.
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