As a libertarian, the subject of environmentalism often makes me uneasy and this dispute in California makes for a good example of why that is. The facts of the case are as follows: from 1997 to 1999, Richard Treanor and Carolynn Bissett planted eight redwood trees in the yard behind their house in Santa Clara county. In 2001, after the trees were already planted, their neighbour, Mark Vargas, decides to install a 10-kilowatt solar power system in his house. At the time, Vargas knew that his neighbours’ trees would eventually grow so big as to cover the sunlight that his solar panels would need, so he approached Treanor and Bissett and asked them to remove the trees or trim them back. They refused, stating that they planted the trees for privacy reasons. Vargas went ahead and installed his solar system anyway.