Nerium oleander /ËnÉªÉriÉm ËoÊliË.Ã¦ndÉr/[3] is a shrub or small tree in the dogbane family Apocynaceae, toxic in all its parts. It is the only species currently classified in the genus Nerium.
Troposphere. The troposphere (from Greek: tropein-to change, circulate or mix) is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer, although some may extend into the lower portion of the stratosphere.emperature and water vapor content in the troposphere decrease rapidly with altitude and thus most of the water vapour in the troposphere is concentrated in the lower, warmer zone. Water vapor concentrations vary with latitude.
Almost all of our weather is created within the troposphere. The stratosphere is just above the troposphere, starting at an average altitude of about 7 miles above sea level. The air here is more dry and less dense. Only the highest clouds can be found in this layer. Aircraft often fly in the lower stratosphere to escape the turbulence present in the troposphere. Near the top of the stratosphere lies the ozone layer. The mesosphere lies just above the stratosphere, ranging from about 30 to 50 miles above sea level. This layer contains chemicals which absorb energy from the sun.