Điền giúp mình vào bài tập nhận xét biểu đồ này ạ 1. Between 1997 and 2010, Australias air pollution levels ________________________. 2.In contrast to Australia, the air pollution in Sweden experienced a_________________________ in its pollution numbers between those same years. 3.While the millions of tonnes of pollution did rise in Sweden, Iceland saw its levels__________________. 4.Levels of pollution in Australia, Sweden and Iceland followed a steady pattern each year. They continuously went up or down between the study periods. In Turkey however, pollution numbers first ______________ between 1997 and 2000 before eventually experiencing a _______________ in 2010.