Read the following passage:
During the late 20th century, many countries experienced a significant shift towards renewable energy sources. This transition was largely driven by a growing awareness of environmental issues and a global push towards sustainability. Nations began investing in solar, wind, and hydroelectric power, aiming to reduce their reliance on fossil fuels.
The success of these initiatives varied from country to country. Some nations, such as Germany and Denmark, led the way in developing and implementing renewable technologies, achieving substantial reductions in carbon emissions. In contrast, others struggled due to political resistance or lack of resources.