A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
used to create new products that are of better quality than the original.
roof covered with vegetation. For questions about construction of a 'normal' roof with sustainable building materials use [building-materials]
fatty liquid extracted from seeds or fruits of plants, used often for consumption but also as biofuel.
the sum of all energy that was spent to create an object or deliver a service