The presentation contains 20 SLIDES: Definition of fiber and its types. Natural fibers with example. Synthetic fibers with examples. Types of synthetic fibers. Rayon with example. Nylon with example. Polyester with example. Acrylic with example. Characteristics of synthetic fibers. Plastic. Characteristics of plastic. Thermoplastic with examples. Thermosetting plastics with examples. Properties and uses of plastics. Plastics are non –reactive. Plastic is light, strong and durable. Plastics are poor conductors. Problems with the use of plastics. Environmental friendly steps.

The presentation contains 22 slides: What is Air pollution ? The types of air pollutants. Sources of air pollution. Natural Sources. Human Sources. Effects of air pollution on humans. Smog. Effects of Smog. Chlorofluorocarbons. Sources of chlorofluorocarbons. Ozone Layer. Hole in the ozone layer. Effects of Ozone depletion. Acid Rain. Marble Cancer. Greenhouse Effect. Consequences of Global warming.