(2005? Yongzhou) Animals, plants and microorganisms (including humans) on the earth depend on three elements of the earth's environment: clean air, clean fresh water and

(1) As a middle school student, one should: ① take an active part in tree planting activities; ② Don't destroy trees at will; ③ No littering; ④ Prevention and control of heavy metal pollution; Protect the ecological environment with practical actions.

(2) Biodiversity includes biological species diversity, genetic diversity and ecosystem diversity. May 22nd every year is the International Biodiversity Day, and protecting biodiversity requires the joint participation of all countries in the world. Creative slogans are: ① Protecting animal and plant resources means protecting ourselves; ? ② The biosphere is the home of all living things; ? ③ Create a green environment and protect the earth's home.

So the answer is: (1)① Actively participate in tree planting activities; ② Don't destroy trees at will; ③ No littering; ④ Prevention and control of heavy metal pollution;

(2)① Protecting animal and plant resources means protecting ourselves; ② The biosphere is the home of all living things; ③ Create a green environment and care for the earth's home.