It is strongly recommended to show a documentary > in summer holiday.
It is because most local students are less busy during the holiday and hence it's a good time to educate them as well as the local citizen the importance of being environmentally friendly.
The hotter weather in recent years implies the advent of global warming. The personal feeling must be able to enhance the educational effect.
Being a reputed broadcasting organization, showing such an educational film can help improving the company's fame and can demonstrate her social responsibility.