Why should I think "green" nowadays?

Being and thinking “green” is not just a passing fashion as it is publicized in magazines etc. Considering our present environmental imperative, making ecologically correct decisions has becoming increasingly important. Bearing in mind that our whole way of life is based on oil consumption we have to start thinking of a more sustainable approach to tread lightly on this planet, and therefore respect and care for the Earth in a sustainable manner and not exploit it as we are doing now.
Note that:
- More than 50 % of the oil consumption in the world is used for the manufacturing of conventional building materials, such as cement.
- Concrete production is harmful to the environment and is said to be responsible for 5 -8% of greenhouse gases.