Radioactivity in our world <span>b. is as old as the universe. </span><span>Radioactive atom spontaneously emits energetic particles or waves, while decays on lighter nuclei (atoms with smaller atomic mass). Radioactivity is used to calculate how old is Earth and living things, for that purpose isotope of carbon is used.</span>
1. Sugar refers to easily metabolized carbohydrate; sweetener is an additive that is added to foods for the sweetening effect 2. Sugar in all its forms does not require authentication; sweeteners need to be approved by an accreditation body or the EU 3. Sugar is caloric, while sweeteners can be caloric or non caloric in nature 4. Intensive sweeteners are prepared by synthetic procedure and provide little or no energy whatsoever; sugar substances eliminate the crucial minerals from your diet
Answer: D. Increase the amount of travel done by bike.
Environment protection has become a concerned issue for the human society because of the fact that certain human activities are deteriorating the quality of air, water, and soil by liberating wastes into the environment.
Among the options given, D. Increase the amount of travel done by bike. is the correct option. This is due to the fact that use of bike instead of using automobile like car will prevent the large amount of emission of harmful gases which are capable of polluting the air, water and soil can be restricted.