Protests held around the UK against sewage pollution

The video discusses efforts to save a lake from the River Thames scheme by channeling river water. A petition with over 48,500 signatures has been launched to address water contamination. The community is actively engaging with water authorities, particularly Thames Water, to take action. The video emphasizes the need for local and national governments to ensure clean water.

What specific issue is the petition trying to address regarding the River Thames?

What role do local and national governments play according to the text?