The 25-meter-high tower contains 40 giant fans, which pump 1,000 cubic meters of air per second through special filters that halve the amount of harmful particles within an area of one square kilometer.
The concentration of such particles in Delhi regularly exceeds internationally set limit values 20 times - especially in winter, when the city's 20 million inhabitants are embedded in a thick smog blanket.
However, many experts are pessimistic, and would have preferred measures to reduce emissions.
The tower costs the equivalent of SEK 17.5 million, and critics point out that the number of facilities that would be needed to improve the air more than on the margin had cost enormous sums.
Fourteen of the world's fifteen most polluted cities are located in India, according to the World Health Organization WHO.