Caring for the marine public welfare environmental theme ppt template

Ocean introduction, resource development and utilization, pollution and ecological damage, protection of the ocean, dolphins, the ocean, caring for the ocean. Let us act, caring for the marine public welfare environmental protection theme ppt template.

Ocean introduction, resource development and utilization, pollution and ecological damage, protection of the ocean, dolphins, the ocean, caring for the ocean. Let us act, caring for the marine public welfare environmental protection theme ppt template.