To produce a Smartphone enormous amounts  of highly toxic waste is produced. 

Gold mining is a major cause of deforestation in the amazon and the extraction process generates cyanide and mercury rich waste. They contaminate water and are detrimental to our ecosystems health.

Tin is used for soldering aswell as the touch. One third of the world's tin supply come from Indonesia's Islands. Mining the sand has destroyed the precious coral ecosystems aswell as drastically decline the fish population.

Rare Earth Elements

are essential for the touch screen, display, electronics, battery, speaker. Extracting rare earth involves the use of sulphuric and hydrofluoric acids and produces a loooot of highly toxic waste.

We will run out of some rare earths in the next 20 to 50 years and should be mindful about our own consumption behavior.