Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 23 to 30.

Renewable energy sources, such as solar and wind power, are becoming increasingly important in today’s world, especially as the effects of climate change become more pronounced. They offer sustainable alternatives to fossil fuels, which contribute significantly to greenhouse gas emissions and environmental degradation. Many countries are investing heavily in renewable energy infrastructure to reduce their carbon footprints and transition to a more sustainable future.

For instance, solar panels are now commonly installed on homes and businesses across various regions, making it easier for individuals to generate their own electricity. Wind farms are being developed in rural areas to harness wind power efficiently and contribute to the local economy. The integration of renewable energy not only helps to combat climate change but also supports job creation in emerging green industries.

While the transition to renewable energy is promising, challenges remain, including energy storage, grid integration, and the initial costs of installation. Policymakers are working to address these issues through incentives and regulations that support renewable energy projects. However, the long-term benefits, such as lower energy bills and a healthier planet, make it a worthwhile investment for individuals and governments alike.

Many communities are beginning to explore energy independence through local renewable projects, such as community solar gardens. This approach not only empowers residents but also creates local jobs and stimulates economic growth. The collective shift toward renewable energy creates opportunities for innovation and economic development, paving the way for a greener future.

Which of the following is NOT mentioned as a type of renewable energy?