The only way to truly test if a variable is undefined is to do the following. Remember, undefined is an object in Javascript. To determine if a variable or object property exists, It is good to compare to keyword undefined or you can also check the type of the object to string âundefinedâ. In the following JavaScript code we compare the num to the undefined in both way.
Nuclear waste -- The waste from nuclear power plants will be toxic for humans for more than 100,000 years. Itâs untenable now to secure and store all of the waste from the plants that exist. To scale up to 2,500 or 3,000, let alone 17,000 plants is unthinkable.
Nuclear power is generated from the Uranium and Plutonium fission. The Uranium in nature consists of two isotopes as U-235 and U-238. U-235 is used for nuclear power generation and is unstable atom decay to give away some energized particles. The emitted particles are known to have drastic impact on the human body. The nuclear waste when disposed into the soil and water remain emitting radioactive rays for about few years.