Senator SCULLION (Northern Territory—Deputy Leader of The Nationals) (14:16): Mr President, I ask a further supplementary question. This question is well within their portfolio ambit. Is the minister aware that electric hot water systems use the most electricity in the average house? Can the minister explain how low-income earners will be able to pay for the increases in their power bills resulting in the double slug of the removal of their solar hot water heating and the introduction of the government's carbon tax?