What is an example of a renewable energy source used in rail systems?

Solar power is an example of a renewable energy source used in rail systems because it harnesses energy from the sun, which is abundant and sustainable. Solar panels installed alongside rail tracks or on station roofs can generate electricity to power trains or support station operations. This form of energy production contributes to reducing greenhouse gas emissions and reliance on fossil fuels, aligning with the goals of many rail systems to promote environmental sustainability and energy efficiency.

Natural gas and nuclear energy, while important energy sources, do not fall into the category of renewable energy, as natural gas is a fossil fuel and nuclear energy, while low in emissions, relies on uranium, which is finite. Wind energy, while also renewable, may not be as directly utilized in rail systems compared to the more commonly integrated solar power.