This week Supreme Court Justice Anthony Kennedy announced his retirement from the Supreme Court. Justice Kennedy, a conservative, was appointed by President Ronald Reagan in 1987. Although conservative, Kennedy’s upbringing in California is credited for his strong libertarian streak, often causing consternation to his court colleagues and petitioners alike. Kennedy often acted as the swing vote on substantial cases, and his legacy will be debated for years. Others will no doubt write on the effect that his retirement, and the effect Trump’s appointment will have on major issues such as the right to abortion and same sex marriage. This blog is concerned with the possible effect of his retirement on environmental regulations and the role of the Supreme Court in interpreting them.