ISHARES SP GLOBAL WATER IDX ETF (CWW-T)

Two different companies; one trades in Toronto, and the other in New York. Essentially based on the identical global water index. Ask yourself if you want to own it in CAD or USD, and that will depend on what type of investment account you have. With CWW, most of the underlying securities are not in Canada. 

Likes them both. He uses the AQWA ETF, which has better exposure.

Doesn't know much about and sees little growth in this. For long-term growth, he prefers VGG or another S&P ETF.

16 years old - signifies ability to consistently perform. 
Water infrastructure products.
Good if bullish on infrastructure.
Defensive name - good for conservative investors.
Benefits from large government expenditures. 

Global water ETF that is half focused on the industrial side, like pipelines and infrastructure for water, and half the utility side. CWW is for the Canadian etf, and PHO trades in the US.

Long term hold? There's nothing wrong with it, but CWW doesn't excite him. You can buy it now, but he feels neutral about it. He'd rather buy SPY.

(A Top Pick Sep 04/19, Up 10%) He sold his shares today due to them holding Olin Corp, a chlorine producer for water treatment, which also owns Winchester Guns and Ammunitions. He had an ethical conflict with owning a company with ties to the gun industry.

This is part of the ESG (environmental, social and governance) theme. It is a good instrument if this cause is close to your heart. Might be early (Which, financially early is like being wrong) as an investment.