Which of the following is categorized under sustainable technologies?

The choice of solar as a sustainable technology is based on its ability to generate energy without depleting natural resources or causing significant environmental harm. Solar energy harnesses the power of the sun, which is an abundant and renewable energy source. Its use contributes to reducing greenhouse gas emissions and minimizing the reliance on fossil fuels, which are finite and contribute to environmental issues such as climate change.

In contrast, natural gas and coal, while they can be more efficient than some other energy sources, are still fossil fuels that emit carbon dioxide when burned, contributing to global warming and environmental degradation. Additionally, their extraction processes can be harmful to ecosystems.

Nuclear energy, while it does produce low greenhouse gas emissions during operation, raises concerns regarding the disposal of nuclear waste, potential accidents, and the long-term sustainability of uranium mining.

Thus, solar energy is considered sustainable because it is renewable, has lower environmental impacts, and supports a move towards a cleaner energy future.