1. Eco-labelling has two major purposes: one is to guide consumers, and another is to encourage manufacturer to design and manufacture environmentally friendly products.2. Food labelled organic makes it clear to consumers that this produce has been grown without conventional pesticides or fertilizers, antibiotics or growth hormones.3. In addition to the damages done to lakes and streams, acid rain will also destroy vegetation, including agricultural crops and trees, and corrode the outsides of buildings.4. Ecotourism could be defined as a style of travel where the emphasis is place on unspoiled, natural destinations and on disturbing the environment as little as possible.5. Many know that water pollution may be caused by chemical wastes poured into rivers, while not many are aware of the pollutants such as silt from soil erosion, and outflow from livestock feedlots.