Air pollution causes millions of premature deaths throughout the world every year, and this number will almost ____ increase in the future. As a result, we ____ start to see more interesting solutions for this problem. One idea to deal with pollution is Daan Roosegaarde's Smog Free Tower-- a tower that sucks in polluted an and blows out clean air. Roosegaarde believes that in the future, towers like this ____ be used to improve the air quality in polluted cities. Roosegaarde says it's ____ to build 'Smog Free Towers' the size of buildings, for an even bigger impact. Although the towers are ____ to solve the problem of air pollution completely, the ____are that we will need to develop many innovative ideas to keep pollution under control.

B2.6-GE-Expressing probability

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