Over the years different principles have been proposed that can be used when thinking about the design, development and implementation of chemical products and processes. Sustainable and green chemistry in very simple terms is just a different way of thinking about how chemistry and chemical engineering can be done. This is a field open for innovation, new ideas, and revolutionary progress. We can do all of this and still maintain economic growth and opportunities while providing affordable products and services to a growing world population. We can employ processes that use smaller amounts of energy. We can design chemical processes that reduce waste and reduce demand on diminishing resources. Through the practice of green chemistry, we can create alternatives to hazardous substances. We are able to develop chemical processes and earth-friendly products that will prevent pollution in the first place. Green Chemistry is not a public relations ploy. Green chemistry takes the EPA's mandate a step further and creates a new reality for chemistry and engineering by asking chemists and engineers to design chemicals, chemical processes and commercial products in a way that, at the very least, avoids the creation of toxics and waste.

The United States formed the Environmental Protection Agency (EPA) in 1970, which was charged with protecting human and environmental health through setting and enforcing environmental regulations. Many governments began to regulate the generation and disposal of industrial wastes and emissions.

Some chemicals in common use were suspected of causing or directly linked to human cancer and other adverse human and environmental health outcomes. There were measurable holes in the earth's ozone. Pollution choked many of the world's waterways and acid rain deteriorated forest health. In our efforts to improve crop protection, commercial products and medicines, we also caused unintended harm to our planet and humans.Д«y the mid-20th century, some of the long-term negative effects of these advancements could not be ignored. The concept of greening chemistry developed in the business and regulatory communities as a natural evolution of pollution prevention initiatives.

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