The old-fashioned lightbulbs, the incandescent bulbs -- I'm not going to ask for a show of hands of how many of you still have them in your homes, wasting energy every time you switch them on -- change them after this -- or whether we have them on the stage here at TED or not -- but those old incandescent light bulbs really should have been sold as heaters.
As antigas lâmpadas,  as lâmpadas incandescentes — não vou pedir que levantem as mãos aqueles que ainda as têm nas suas casas, gastando energia de cada vez que  as acendem, mudem-nas depois disto; ou se até as temos aqui no palco do TED ou não — mas essas velhas lâmpadas  incandescentes deveriam era ter sido vendidas como aquecedores.