Renewable energy: definition

Renewable energy, also sometimes referred to as clean energy, is the concept of using energy sources that are easily replenished and do not depend on the use of finite resources such as oils or fossil fuels. Examples of renewable energy include solar power and wind power. 

Unlike fossil fuels, which are finite sources of energy and release significant greenhouse gas emissions when burned, renewable energy sources can be replenished more easily seeing as they come from resources that are abundant, sustainable, and typically do not generate a harmful environmental impact.

These energy sources can be harnessed without depleting the Earth’s finite resources, making them a pivotal component in our global efforts to mitigate climate change, air pollution, and improve energy security. Furthermore, it is also necessary to build infrastructure to secure renewable energy and to utilize additional resurces such as rare metals.

Examples of Renewable Energy

• Solar Energy which includes capturing sunlight using photovoltaic panels or concentrated solar power systems.
• Wind Energy which uses turbines powered by moving air to generate electricity.
• Hydropower which converts the energy of flowing water into electricity, usually through dams or run-of-river systems.
• Geothermal Energy which harnesses heat stored beneath the Earth’s surface for electricity generation and direct heating, such as in Iceland. 
• Biomass Energy which produces energy from organic materials such as crop waste, wood, and biofuels.
  

Renewable energy plays an essential role in helping the world to transition away from the use of fossil fuels, reduce greenhouse gas emissions, and avoid the most deleterious effects of climate change. Furthermore, the use of renewable energy also reduces reliance on imported fuels, creates jobs, and encourages sustainable development – all of which can further protect the environment and make production and consumption more sustainable moving forward.

Examples of Renewable Energy in Practice:

• How Iceland utilizes geothermal energy to heat their sidewalks or even power popular touristic spots like the Blue Lagoon 
• Homes with rooftop solar panels are installed that provide clean electricity and reduce monthly utility bills
• Windy regions near the shore that have installed wind turbines for a reputable source of electricity

FAQ

Is renewable energy always zero-emission?

While the process of using renewable energy itself is usually low- or zero-emission, it is important to note that emissions can occur during manufacturing, installation, and maintenance.

Is renewable energy cheaper than fossil fuels?

Yes, in many regions of the world – solar and wind power have become more affordable sources of electricity.

Can renewable energy fully replace fossil fuels?

Yes, with sufficient investment in infrastructure, storage, and grid modernization – renewable energy can take complete precedent over fossil fuels, but this would require extensive time, planning, and commitment to the transition.

What’s the difference between renewable and sustainable energy?

Renewable energy simply refers to sources that can be naturally replenished, whereas sustainable energy also takes the long-term social and economic impact of energy into account. 

What are the biggest challenges of renewable energy?

The biggest roadblocks for renewable energy include adequate storage, the need for updated infrastructure, and taking intermittency into account – such as factoring days where there is no sun on a rainy day or no wind on still days.