In The Baltimore Sun (ironic) is an article today requiring a neighbor to cut his trees down because they block his neighbor's solar collector.
The trees were there first, but the court sides with the owner of the solar collector.
Typical of California here in the US.
In trees vs. solar power battle, redwoods lose a round in Calif. -- Environmental Issues, California -- baltimoresun.com
The first "solar collectors" were trees!