rear view,in silhouette sunset of family,baby boy age 2 yearold riding the neck of father raises arms into air and open arms while look and walking to rural field with great freedom together.teaching children about sustainability concept. - 環保人士 個影片檔及 b 捲影像00:17
multiracial group of student both boy and girl learning to grow vegetables with teacher at green house farm - 環保人士 個影片檔及 b 捲影像00:18
senior research team is committed to solving the problem of global warming or solving the greenhouse problem. - 環保人士 個影片檔及 b 捲影像00:16
a group of climate activists are marching together in a demonstration against climate change - 環保人士 個影片檔及 b 捲影像00:22