The environmental movement might be said to have begun centuries ago as a response to industrialization. In the nineteenth century, the British Romantic Poets extolled the beauties of nature, while American writer Henry David Thoreau praised the return to a simpler life, guided by the values implicit in nature. It was a dichotomy that continued well into the twentieth century.In the aftermath of the Second World War, the rise of the nuclear age introduced fears of a new kind of pollution from deadly radiation. The environmental movement gained new momentum in 1962 with the publication of Rachel Carson’s book “The Silent Spring”, which warned about the agricultural use of synthetic chemical pesticides. A scientist and writer, Ms. Carson stressed the need to respect the ecosystem in which we live, in order to protect human health as well as the environment.In 1969, the first, iconic photos of the Earth from outer space touched the hearts of humanity with Its simplicity and beauty. Seeing for the first time this “big blue marble” in an immense galaxy brought home to many that we live on One Earth — a fragile, interdependent ecosystem. And our responsibility to protect the health and well-being of that ecosystem began to dawn on the collective consciousness of the world.With the ending of the tumultuous decade of the 1960s, its highest ideals and visions began to be translated into practical form. Among these was the environmental vision — now, quite literally, a globalphenomenon. As universal concern about the healthy and sustainable use of the planet and its resources continued to grow, the UN, in 1972, convened the United Nations Conference on the Human Environment, in Stockholm.It was a landmark event, and its final Declaration contains 19 principles that represent an environmental manifesto for our times. In addressing the need “to inspire and guide the peoples of the world in the preservation and enhancement of the human environment”, it laid the groundwork for the new environmental agenda of the United Nations system.