Opium wars is the name given to the 19th century conflict between Britain and China, which centered around a dispute between a specific and illegal good being imported into China by English merchants.
You want to charge a price that earns a premium fit , you want to charge a price that covers variable costs
1. Green water algae
2. Green spot algae
3. Black Brush algae
4. Staghorn algae
5. Hair algae
I believe the answer is: Consumers must be knowledgeable
Competition in the free market encourage producers to keep reducing the cost to make their products so it come up cheaper compared to competitors' products. This improve the chance of them using materials or methods that are dangerous for the consumers. Consumers need to be knowledgeable to distinguish the things hat might endanger us and which things are not.
