June 5, 1972, Conference on the Human Environment in Stockholm in the opening, at which the adoption of the famous "Declaration on the Human Environment."

1972年6月5日，人类环境会议在斯德哥尔摩开幕，会上通过了著名的《人类环境宣言》。

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During the Copenhagen conference, people start to re - examine the influence of human activity on environment and human being.

在哥本哈根会议召开之际，人们开始重新审视人类活动对环境和人类自身的影响。

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World Environment Day was established by the United Nations General Assembly in 1972 to mark the opening of the Stockholm Conference on the Human Environment.

BBC: NEWS | Science/Nature | Changing planet revealed in atlas

On 5 June 1972, in the Swedish capital, they began to build their response, in the form of the United Nations Conference on the Human Environment - the first UN summit on the environment, and the event that really put the issue on the global political agenda.

BBC: Stockholm: Birth of the green generation