BEIJING, May 23 (Reuters) -
* China's April scrap aluminium imports fell by 27.8 percent from March to 130,000 tonnes, after the country slapped a 25 percent import tariff on aluminium scrap from the United States, its biggest supplier of the material, with effect from Apr. 2
* April scrap aluminium imports also fell 23.1 percent year on year, data from the General Administrations of Customs showed on Wednesday
* China Jan-April scrap aluminium imports were down 11.4 percent year on year at 620,000 tonnes
* China this year introduced new impurity thresholds on imported waste, including metals, as part of a crackdown on "foreign garbage," sending imports significantly lower.
* China's April scrap metal imports fell 35.9 percent year on year to 440,000 tonnes
* Jan-April scrap metal imports were down 31 percent year on year at 1.94 mln tonnes
* China April scrap copper imports down 36.7 pct year on year at 180,000 tonnes
* China Jan-April scrap copper imports down 38.5 percent year on year at 740,000 tonnes
* China, for the second month in a row, imported zero waste plastic in April
* China Jan-April waste plastic imports were down 99.5 percent year on year at 10,000 tonnes
* China's April waste paper imports were down 47.5 percent year on year at 1.19 mln tonnes
* China Jan-April waste paper imports down 49 percent year on year at 5.12 mln tonnes (Reporting by Tom Daly; editing by Richard Pullin)