Energy Transition

5 milestones in green energy

Workers installing solar panels.

Energy currently accounts for two-thirds of total greenhouse gas. Image: Unsplash/Science in HD

Victoria Masterson
Senior Writer, Forum Agenda
Our Impact
What's the World Economic Forum doing to accelerate action on Energy Transition?
The Big Picture
Explore and monitor how SDG 07: Affordable and Clean Energy is affecting economies, industries and global issues
A hand holding a looking glass by a lake
Crowdsource Innovation
Get involved with our crowdsourced digital platform to deliver impact at scale
Stay up to date:

Decarbonizing Energy

  • COVID-19 has not slowed the rise globally in sustainable energy sources.
  • 2020 saw unprecedented demand, adding 260GW of capacity.
  • Solar power is now the cheapest source of electricity in history, says the IEA.
  • Read the Energy Transition Index 2021.

Energy accounts for two-thirds of total greenhouse gas, so embracing cleaner sources is key to fighting climate change.

And while the energy transition still has a way to go, renewable energy is nonetheless on a roll, according to the International Renewable Energy Agency (IRENA). The energy transition is an "unstoppable" trend, the agency said.

Here are some recent historic shifts in energy use that illustrate that trend.

Have you read?

1. 2020 was a record year for renewables

Globally, 260 gigawatts (GW) of renewable energy capacity were added in 2020, exceeding expansion in 2019 by close to 50% – and breaking all previous records, IRENA says.

More than 80% of all new electricity capacity added last year was renewable, with solar and wind accounting for 91% of new renewables, according to the agency’s Renewable Capacity Statistics 2021. Total fossil fuel additions fell from 64GW to 60GW over the same period.

“These numbers tell a remarkable story of resilience and hope,” IRENA Director-General Francesco La Camera said.

Renewable share of annual power capacity expansion.
Renewable energy use is soaring globally. Image: Renewable capacity highlights 2021, International Renewable Energy Agency

2. Britain had its greenest day on record

Easter Monday, 5 April, broke a renewable energy record for Great Britain.

The nation’s electricity grid reached the greenest it’s ever been, with zero-carbon power sources including wind, solar and nuclear making up 80% of the energy mix.

At the same time, the carbon intensity of electricity – the measure of CO2 emissions per unit of electricity consumed – dropped to 39gCO2, the lowest figure in history.

3. IEA crowns solar ‘the new king of electricity supply’

Solar power will be the new king of electricity supply and looks set for massive expansion, according to the International Energy Agency (IEA).

Its World Energy Outlook 2020 report predicts renewables will set new records each year after 2022, thanks to “widely available resources, declining costs and policy support in over 130 countries.”

“For projects with low cost financing that tap high quality resources, solar PV is now the cheapest source of electricity in history,” the IEA says.

This includes being more cost-effective than coal and gas in many countries today, including in the largest markets – the United States, European Union, China and India.

Global solar PV and coal-fired installed capacity by scenario, 2010-2030.
Use of solar power is predicted to surge. Image: World Energy Outlook 2020, IEA

4. Adelaide’s operations run on 100% renewable electricity

Swimming pools, car parks, depots and community buildings in the Southern Australia capital of Adelaide are now powered entirely by renewable energy.

The city is the first council in South Australia to use 100% renewable electricity across its operations, including the historic Adelaide Town Hall, which was built in 1866.

The switch will reduce emissions by more than 11,000 tonnes a year – the equivalent of taking 3,500 cars off the road.

5. Viet Nam increases solar capacity by 25 times in just one year

Government-backed incentives to install rooftop solar systems helped Viet Nam soar to new solar energy highs in 2020.

By the end of December, 9.3GW of solar capacity had been added – equivalent to six coal power plants – and a 25-fold increase in installed capacity compared to a year earlier.

There are now more than 101,000 rooftop solar systems on homes, offices and factories across the country, according to Vietnam Electricity, the state utility.

For more about the future of energy, read the Forum’s "Energy Transition Index 2020" here. This is a fact-based ranking to help policymakers and business leaders plot a course for a successful energy transition.

Don't miss any update on this topic

Create a free account and access your personalized content collection with our latest publications and analyses.

Sign up for free

License and Republishing

World Economic Forum articles may be republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License, and in accordance with our Terms of Use.

The views expressed in this article are those of the author alone and not the World Economic Forum.

World Economic Forum logo
Global Agenda

The Agenda Weekly

A weekly update of the most important issues driving the global agenda

Subscribe today

You can unsubscribe at any time using the link in our emails. For more details, review our privacy policy.

What is energy literacy and why is it important? Malaysia’s programme sees the potential

Olivia Zeydler

May 29, 2024

About Us



Partners & Members

  • Join Us

Language Editions

Privacy Policy & Terms of Service

© 2024 World Economic Forum