Cities can be considered as 'ecosystems', albeit with a high technical component. Their urban metabolism is an open and dynamic system, which consumes, transforms and releases materials and energy, develops and adapts to changes, and interacts with humans and other ecosystems. Therefore they should be analysed and managed as other ecosystems.
The plastic bags you use but for a few minutes can last for as long as 15 to 1,000 years in the environment. Don't get a new plastic bag each time you go shopping. Get a funky re-useable or cotton bag instead and say 'no thanks' to plastic or paper bags.
More green tips