The Prince of Wales has been involved in fighting climate change and protecting the environment for longer than most people.

Judge as of 2021-10-31. The claim is that Prince Charles (then Prince of Wales) had been publicly involved in climate and environmental causes for longer than most people. True: the record shows sustained, documented environmental advocacy going back several decades before 2021 (for example speeches, campaigns, charities or initiatives on pollution, conservation, sustainability or climate from the 1970s or 1980s onward). That would put his involvement ahead of most public figures and campaigners on the issue. Mostly true: long-standing environmental involvement is documented, but his specific work on climate change starts later than the claim implies, while general environmental advocacy is long-standing. Mixed: the documented involvement covers only some decades, or is intermittent, so the comparison with 'most' is only partly supported. Mostly false: his involvement is real but recent or minor, and the claim greatly overstates how long it has lasted. False: there is no substantial environmental involvement before the 2010s.

Set before the research began.

1. E1 King Charles' 50-year fight against climate change Corporate Knights · 19 September 2022

   “On February 19, 1970, a nervous, 21-year-old Cambridge University student, wearing a mud-brown suit typical of the times, warned the Welsh Countryside Commission in Cardiff about “the horrifying effects of pollution in all its cancerous forms.””

2. E2 Harvard Medical School's Center for Health and the Global Environment Honors His Royal Highness The Prince of Wales Harvard Medical School · 28 January 2007

   ““Prince Charles has been a forward thinker on environmental issues since the 1970s, on issues ranging from sustainable agriculture to climate change,” said former Vice President Al Gore, who was the recipient of the Global Environmental Citizen Award in 2005.”

3. E3 Harvard Medical School's Center for Health and the Global Environment Honors His Royal Highness The Prince of Wales Harvard Medical School · 28 January 2007

   “His Royal Highness has publicly voiced his concerns about the natural environment for decades – in holding seminars and discussions, in advocating and encouraging corporate action, and in setting up various organizations and practical initiatives, such as converting the farm at Highgrove, his country home, to organic methods.”

4. E4 Prince Charles pushed markets over State at Davos Down To Earth · 4 February 2020

   “Charles, the Prince of Wales, who spoke at Davos, Switzerland, which hosted the World Economic Forum’s annual meeting, in January 2020 made his first speech on environment in 1968.”

E1 records a dated 1970 speech by the Prince warning about the effects of pollution, and E4 reports that his first speech on the environment was in 1968. E2 quotes Al Gore in 2007 saying the Prince had been a forward thinker on environmental issues since the 1970s, including climate change. E3 describes decades of public advocacy, organisations and practical initiatives such as organic farming at Highgrove. Together, these independent sources show sustained environmental involvement going back to the late 1960s and 1970s, which meets the criteria for true.