MasterCard, Visa and American Express are promoting contactless versions of their credit cards, which only need to be held near a special reader at the checkout counter for a sale to go through, making the standard card swiper no longer necessary.
Filters in a new and used cigarette. Cigarette filters are an essential non-tobacco part of a filter cigarette, and have a profound effect on the yield and composition of cigarette smoke. The filter may be made from cellulose acetate fibre, paper or activated charcoal.
Discarded cigarette butts are a blight on city streets â but now one group of scientists has come up with a way to reuse them to save the environment. Researchers from South Korea believe they can convert cigarette filters into a material that could be used by computers, electrical vehicles and wind turbines to store energy. This material can be used to coat the electrodes of supercapacitors, which are components that can store extremely large amounts of electrical energy.