The *independent* variable is the one that you always can control. However, the dependent variables are not since they **depend** on another.
So scientist around the world can share there info without having to convert and doing extra work.
Answer:
benefits: can help reduce waste in land fills, and promotes reusability (turned into different products)
drawbacks: can be much more expensive to salvage than to just throw it in a landfill, and most of the time products cannot be recycled effectively due to its material.
