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 could cause a meltdown any day at any time which could cause many casualties and the radiation of the meltdown could also cause thyroid cancer in far places. Also the underground pipes have been leaking radioactive waste for many years and is contaminating the ground water at different sites.Report Post.he only harmful thing about nuclear energy is that the process of getting uranium pollutes the earth!!!! Uranium energy can be dangerous if the people working at the power plant aren't taught well enough to handle it.