Since the mid-1900s, humans have been exerting an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and burning fossil fuels, have significantly altered the amount of fixed nitrogen in the Earth's ecosystems. In fact, some predict that by 2030, the amount of nitrogen fixed by human activities will exceed that fixed by microbial processes (Vitousek 1997).
1 Faux leather is man made fabric (usually polyester) that has been treated with wax, dye, polyurethane, or PVC (polyvinyl chloride) for color and texture that feel like real leather at a much lower cost.
Bonded leather -- it looks and feels like leather, and even contains bits and scraps of cowhide, but it is a man-made product. Bonded leather furniture such as couches, chairs and ottomans, is not as well-made as furniture covered with top-grain leather, and this is reflected in its price.onded leather -- it looks and feels like leather, and even contains bits and scraps of cowhide, but it is a man-made product. Bonded leather furniture such as couches, chairs and ottomans, is not as well-made as furniture covered with top-grain leather, and this is reflected in its price.