A woody, porous and flexible material found in plant peels such as cumin oak and used for a variety of uses. Most of the cork in the world is produced in Portugal.
It is flexible and imperfection to liquids.The low density of the cork makes it suitable for the manufacture of fishing floats, and cork sheets are used for flooring and the manufacture of bulletin boards and in recent years even for the design of various furniture and objects for the design of the house.
Environmentalists encourage the cork industry, as it is based on renewable sources and easy products for recycling. Unlike the other wood industries, the unique process of cork production does not harm the tree itself. The tree bark thickens each year by several millimeters until it reaches the desired thickness (between 2 and 5 cm), each tree is peeled only once every ten years, and peeling and peeling allows the tree to recover and rest. Average peels during the life of a tree.
About natural rubber:
Natural rubber is produced in about 7,500 plant species. The milky mohel resulting from wounds from plants of the family of the Euphorbia, the strawberry, the oleander, the complex, the scalpel and the poppy is actually a latex - a suspension of rubber particles in aqueous solution.
Of the variety of plants that produce only a few grammings have been used throughout history for the production of natural rubber, the main source for the production of rubber from the nineteenth century onwards is the Hawaiian rubber tree Brazilian Hevea brasiliens.