Question textAir pollution is now a huge issue. It is so serious that the Answer 1 Question 1[input] has named it as the single biggest Answer 2 Question 1[input] problem globally. In 2012, it was estimated that every year globally over Answer 3 Question 1[input] deaths could be directly linked to air pollution. Air pollution is a complex issue because of the different types of pollutants and their different Answer 4 Question 1[input]. The lecture discusses Answer 5 Question 1[input] types of air pollution and gives two illustrative examples.多项填空题