"By 2025, there will be 20 more megacities from 21 years ago, a United Nations report revealed in March last year. A point of concern perhaps, considering these bustling metropolises are the largest contributors of air pollution, accounting for at least 80 percent of all CO2 emissions. However, with the ascension of urban growth, there has been a positive penetration of architectural practices committed to incorporating greener design functionalities." (Quoted from article)