julia butterfy hill was upset . a large company cut down big redwood trees in a forest in california . in the u. s. the company cut down several trees for wood . redwood trees are the tallest trees in the world and they are very old . julia believes that these trees are very important to the earth because they are so old . she did not wont the company to cut down the trees . the trees were in danger . and she wanted to protect them . so one day . julia butterfly hill climbed a tell tree in that forest and lived in it . julia is tree is 180 feet ( about 55 meters) tall and over 1000 year old . julia called her tree luna . she lived in the tree for more than two years.