For over two centuries, our modern world has been powered by fossil fuels—coal, oil, and natural gas. This has driven incredible industrial and economic growth, but it has come at
Faglig kvalitetssikret av lærere og toppstudenter · Følger læreplanen (LK20) · Sist oppdatert 2026-07-16
Introduction
For over two centuries, our modern world has been powered by fossil fuels—coal, oil, and natural gas. This has driven incredible industrial and economic growth, but it has come at a severe cost: climate change. The burning of fossil fuels is the primary cause of the greenhouse gas emissions that are warming our planet. To avert the worst impacts of this climate crisis, humanity must undertake a massive and rapid transition in how we produce and consume energy. This transition is often called the green shift, and its destination is a future powered by clean, renewable energy.
Learning objectives
After reading this article, you should be able to:
- Explain the difference between renewable and non-renewable energy sources.
- Describe the main types of renewable energy, including solar, wind, and hydropower.
- Analyse the main advantages and disadvantages of renewable energy.
- Understand the concept of the "green shift" or energy transition.
- Discuss the role of technology, policy, and individual action in accelerating this transition.
Renewable vs. Non-Renewable Energy
Energy sources can be divided into two main categories. Non-renewable energy comes from sources that will eventually run out. Fossil fuels are the main example. They were formed from the remains of ancient plants and animals over millions of years, and we are consuming them far faster than they can be replenished. Once we burn them, they are gone forever, and their combustion releases harmful greenhouse gases.
Renewable energy, on the other hand, comes from sources that are naturally replenished and will not run out. They are generally considered "clean" because they produce few or no greenhouse gas emissions. The green shift is the process of moving our entire energy system from being dependent on non-renewable sources to being based on renewable ones. …