A: Her family used 29.645 kilowatts of electricity last month.

(2)① Using recycled fiber to make paper can greatly reduce the consumption of trees, water and electricity and the emission of pollutants.

(2) In foreign countries, waste paper is called forest resources in cities, because it is waste newspapers, books and periodicals, office paper, kraft paper, cartons, corrugated paper and so on. , is a valuable fiber raw material.