Question:What is nuclear waste?
The nuclear power industry creates several products that are highly radioactive, and mostly not useful.
These radioactive products are called nuclear waste.
Nuclear waste is harmful because it is radioactive.
The exam board specifically want you to know that "Nuclear waste does not cause Global Warming".
The Exam Board want you to realise that Nuclear power does not release Carbon Dioxide into the atmosphere, and therefore does not contribute to the Enhanced Greenhouse effect and will not therefore contribute to Climate Change/Global Warming.