Fresh, natural and environmentally friendly PPT to protect the ecological environment

The fresh, natural and environmentally friendly PPT that protects the ecological environment uses a pure light blue sky as the background of the PPT, reminiscent of pure air, rejects smog, and environmental problems start from me and start now.

The fresh, natural and environmentally friendly PPT that protects the ecological environment uses a pure light blue sky as the background of the PPT, reminiscent of pure air, rejects smog, and environmental problems start from me and start now.