DAR ES SALAAM: THE global demand for energy has grown significantly over the past century due to population growth, industrial development and rapid urbanisation. Traditionally, most of the world’s energy has been generated from fossil fuels such as coal, oil and natural gas.
While these sources have powered economic growth for decades, they also contribute heavily to environmental challenges, particularly climate change. As a result, many countries are now turning their attention toward renewable energy sources as a sustainable solution for meeting future energy needs.
Renewable energy, which includes sources such as solar, wind, hydro, geothermal and biomass, offers a cleaner and more sustainable alternative to traditional energy systems. One of the most important reasons for the global shift toward renewable energy is the urgent need to reduce greenhouse gas emissions. Fossil fuel combustion releases large amounts of carbon dioxide (CO₂) and other greenhouse gases into the atmosphere.
These emissions trap heat and contribute to global warming. According to international energy reports, the energy sector alone accounts for nearly three-quarters of global greenhouse gas emissions. In response, governments, organisations and industries worldwide are investing heavily in renewable technologies to transition toward a low-carbon future.
In recent years, renewable energy has experienced remarkable growth. Solar and wind power, in particular, have become some of the fastest-growing sources of electricity globally. Advances in technology have significantly reduced the cost of renewable energy systems, making them more competitive with fossil fuels.
For example, the cost of solar photovoltaic panels has dropped by more than 80 per cent over the past decade, making solar energy accessible to both developed and developing countries. Although fossil fuels still dominate global energy production, renewable energy sources are steadily increasing their share.
Hydropower remains the largest renewable energy source, contributing around 15 per cent of global electricity. However, wind and solar power are growing rapidly and are expected to expand further in the coming decades. Solar energy is particularly promising due to its abundance and versatility.
Solar panels convert sunlight directly into electricity using photovoltaic cells. These panels can be installed on rooftops, in large solar farms, or even integrated into building materials. Countries such as China, the United States, India and Germany have invested heavily in solar infrastructure. As a result, solar power capacity worldwide has grown dramatically in the last decade. In many sunny regions, solar energy is now one of the cheapest sources of electricity available. Wind energy is another key component of the renewable energy transition. Wind turbines generate electricity by converting the kinetic energy of wind into mechanical power, which is then transformed into electricity. Wind farms can be built on land (onshore) or in oceans and lakes (offshore).
Offshore wind farms are becoming increasingly popular because wind speeds over water are often stronger and more consistent. Europe, particularly countries such as the United Kingdom, Denmark and Germany, has been a leader in offshore wind development. Hydropower has long been the most established renewable energy source. It generates electricity by harnessing the energy of flowing or falling water, usually through dams.
Large hydropower plants supply electricity to millions of people worldwide. However, hydropower projects can have environmental and social impacts, including ecosystem disruption and displacement of communities. As a result, many countries are now focusing on smaller and more environmentally friendly hydro projects. Another emerging renewable source is geothermal energy, which utilises heat from beneath the Earth’s surface.
This type of energy is particularly effective in regions with significant geothermal activity, such as Iceland, Kenya and parts of the United States. Geothermal power plants can produce electricity continuously, making them a reliable complement to intermittent sources like solar and wind. he global generation of electricity comes from several major energy sources, each contributing a different share to the overall supply.
Coal remains the largest source of electricity worldwide, accounting for approximately 36 per cent of total global electricity generation. Despite increasing environmental concerns, coal continues to play a major role in many countries because it is widely available and relatively inexpensive.
The second-largest source is natural gas, which contributes around 23 per cent of global electricity production. Natural gas is often considered a cleaner fossil fuel compared to coal because it produces lower carbon dioxide emissions when burned.
Among renewable sources, hydropower is the largest contributor, generating about 15 per cent of the world’s electricity. Hydropower plants use the energy of flowing or falling water to produce electricity and have been widely used for many decades.
Wind energy has grown rapidly in recent years and now accounts for approximately 10 per cent of global electricity generation.
Wind turbines convert the energy of moving air into electricity and many countries are expanding wind farms both on land and offshore. Nuclear energy contributes around 9 per cent of global electricity. Nuclear power plants generate electricity through nuclear reactions, producing large amounts of energy with very low direct carbon emissions. Solar energy provides about 7 per cent of global electricity production. Solar panels convert sunlight into electricity and their use has expanded significantly due to declining technology costs and increased investment in renewable energy.
Finally, other renewable energy sources, including geothermal, biomass and tidal energy, contribute approximately 3 per cent of global electricity generation. Although their share is relatively small, these sources are gradually expanding as countries diversify their renewable energy portfolios. Despite the many benefits of renewable energy, several challenges remain.
One of the main challenges is energy storage. Solar and wind energy depend on weather conditions and are therefore intermittent. For example, solar panels cannot generate electricity at night and wind turbines require sufficient wind speeds to operate effectively. To address this issue, researchers and companies are developing advanced battery technologies and other energy storage systems that can store excess energy for later use.
Another challenge is the need for modern energy infrastructure. Many countries must upgrade their power grids to handle the increasing amount of renewable energy entering the system. Smart grids, which use digital technology to monitor and manage electricity flows, are becoming essential for integrating renewable energy efficiently. In addition to environmental benefits, renewable energy also provides significant economic opportunities.
The renewable energy sector has become a major source of employment worldwide. According to global energy organisations, millions of jobs have been created in industries such as solar panel manufacturing, wind turbine installation and renewable energy research. As investments in renewable energy continue to grow, the sector is expected to create even more employment opportunities in the future.
Developing countries are also benefiting from renewable energy expansion. In regions where access to electricity remains limited, renewable energy technologies such as small solar systems and minigrids provide affordable and reliable power to rural communities. These solutions can improve living standards by enabling lighting, communication, education and healthcare services.
Africa, for example, has enormous potential for renewable energy development. The continent receives some of the highest levels of solar radiation in the world, making solar power particularly attractive. Countries such as Kenya have already made significant progress in geothermal energy, while Morocco and South Africa have invested heavily in solar and wind projects.
With the right policies and investments, renewable energy could play a transformative role in Africa’s economic and social development. Looking ahead, the future of renewable energy appears promising.
Governments worldwide are adopting policies to encourage renewable energy adoption, including tax incentives, subsidies and renewable energy targets. Technological innovation is also expected to continue improving efficiency and reducing costs.
Your email address will not be published. Required fields are marked *
Comment *
Name *
Email *
Website

Δ

source