Pictures of hard-pen calligraphy works depicting environmental protection

Environmental protection is the responsibility of every citizen, and a good environmental protection can improve our quality of life. So, have you ever enjoyed the pictures of hard-pen calligraphy works depicting environmental protection? The following are pictures of my hard-pen calligraphy works describing environmental protection.

Picture appreciation of hard-pen calligraphy works describing environmental protection

Pictures depicting environmentally friendly hard-pen calligraphy works 1

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1972 the development prospect of environmental protection after the United nations conference on human environment, environmental protection? This term is widely used. Like the former Soviet Union? Nature conservation? This traditional phrase has gradually become? Environmental protection? ; China proposed in 1956? Comprehensive utilization? Industrial waste policy put forward in the late 1960s? Three wastes? The concept of treatment and recycling changed to the 1970s? Environmental protection? This relatively scientific concept.