CLEAN : Giant 'Climate Clock' launched in NYC counting down to 1.5 degrees warming

The video discusses the urgency of addressing climate change within the next seven years, emphasizing the importance of the carbon clock as a tool to raise awareness. It highlights the need for political action and voting to influence climate policy. The video also clarifies that the carbon clock does not signify the end of the world but rather a gradual degradation of life quality if action is not taken.

What does the speaker mean by 'cross the red line of 1.5 degrees centigrade'?

Why is it important for people to be aware of the short timeline regarding climate change?