You betcha, and the reason is because when you get rid of your smartphone, or buy a new one, the impact of the one you left behind and the new one in your hand to the environment is great.  To understand that impact you have to know a few things.

First what is your smart phone made of:

The main parts are the LCD display made of glass, platic and liquid crystalline. Plastic is made from crude oil. Circuit boards or electronics and the battery.

Second can your phone be recycled:

The easy answer to this is yes! Read more about the secret life of your cell phone in this cool infographic.