If demand for global water will exceed supply by 40% by 2030. How can I financially take advantage of this?

I recently read this article: https://www.reddit.com/r/todayilearned/comments/1b0z9fb/til_that_demand_for_global_water_will_exceed/

That predicts demand for global water supply will exceed supply by 2030. How can I invest money to take advantage of this?

I also watched The Big Short recently and it states at the end of the film that the person Brad Pitts character is based on – is investing all his money in water. How can I replicate what he is doing here as well?