Question

aluminium can effect the environment

Answer 1

While an eyesore if they are on the surface, Aluminum cans are pretty benign.  Aluminum doesn't rust or disintegrate, so it is about as inert as a rock.

The food or beverage they contain will be biodegradeable, so that will very little impact. 

Aluminum is made using large amounts of electricity - so that electricity almost always comes from inexpensive hydropower in Western nations.
Aluminum smelters are usually build near hydro dams.
So there is near zero carbon impact in Western nations, and even many of developing nations also use hydropower to make aluminum.
There is also significant recycling of aluminum.

A significant part for the Earth's crust has aluminum in some form. Bauxite is available in a number of locations, but viable deposits generally need to have relatively pure mineral located close inexpensive water transport to smelters. 

hope this helps you.....:)

Answer 2

Overall, the entire process of transforming raw bauxite into aluminum is incredibly energy intensive, requiring copious amounts of electricity, water and resources to produce (that is the main reason why power plants are built solely to support the aluminum industry).