The chemical engineering discipline includes the design, development, construction and operation of industrial processes for the production of a diverse range of products. Modern chemical engineering is also concerned with valuable new materials and techniques such as biomedical engineering and nanotechnology. The chemical engineering profession today is a key contributor to any countrys economic growth. The field is so wide and important that it finds its applications in almost all walks of life, be it food and nourishment (fertilizers, insecticides, herbicides, oils and fats), clothing and housing (synthetic fibres, plastics and polymers, plywood and hardboards, paints and varnishes, rubber), healthcare (artificial organs, drugs and pharmaceuticals), cosmetics (soaps, shampoos, perfumes), energy (oil and natural gas, synthetic fuels, solar energy, wind energy, biomass, energy from wastes, fuel cells, batteries, nuclear energy), communication (papers, pencils, printing inks, magnetic tapes and records), defence (explosives, bullet proof jackets, high performance materials) and protection of environment (catalytic converters, effluent treatment facilities), etc. Nearly all industries producing consumer goods directly or indirectly need the products of chemical industry.