Actually they are indications of pure air but also lichen on a tree indicates that the tree may be in declining health. Lichen is a combination of algae and fungus and grows very very slowly. Moss is an indication that there needs to be some better air circulation on that tree. Consider a good pruning in early spring.aving lichens and moss on your tree is an indication that the air around your tree is healthy and clean. They do not harm the tree. They have synergistic relationships with the biosphere of the tree that are more interesting if you leave them there.
Officials said Nevadaâs Lake Mead, the 79-year-old reservoir created by the massive Hoover Dam, registered 1,074.98 feet (327.7 meters) above sea level late on Tuesday, but was able to rise above a critical mark by early on Wednesday morning.
On Lake Mead, the white line is where the water used to be. CBS News. Lake Mead was created by the Hoover Dam in 1935. It provides water for 20 million people in southern Nevada, southern California and Arizona. Since 2000, the lake has lost 4 trillion gallons of water.ithout Lake Mead, there would be no Las Vegas.. Pat Mulroy of the Southern Nevada Water Authority. CBS News. All of us are in it together, and all of us are either going to survive this or all of us are going to feel the consequences, Mulroy said.