It was also an exchange of culture. When people from different cultures met they learned about each other and shared ideas.
The statement that offers the best description is that they were battling on us territory which makes it easier for americans.
Pollutants is the general term.
Chemical pollutants. Waste pollutants. Chlorofluorocarbons
The main reason for british colonization of Singapore was to obtain use of its harbor and ports. Singapore was in a very strategic position for certain trade and shipping routes.