protection of our earth

https://www.youtube.com/watch?v=tllM7rZkuXQ&ab_channel=%CE%A3%CE%BF%CF%86%CE%B9%CE%B1%CE%BA%CF%85%CF%80%CE%B9%CF%81%CF%84%CE%BF%CE%B3%CE%BB%CE%BF%CF%85

we talked about the environmental pollution