Photodegradation is the alteration of materials by light. Typically, the term refers to the combined action of sunlight and air. Though photodegradation does eventually degrade plastic, this is a very slow and inefficient process.
The UK will host the 26th UN Climate Change Conference of the Parties (COP26) in Glasgow on 1 – 12 November 2021. All countries will submit their long-term goals to address the global climate emergency.
To 'leave no footprints' means to do / see / experience something without adversely impacting it. As we seek to get closer to nature, it is imperative we don't cause harm to it, or change it.