Take Asus's N51V laptop computer. Usage accounts for roughly 40 % of the product's carbon footprint over its entire lifecycle (37 % for home users, and 48 % for office users). In the case of a carbon-footprint-certified 32 "LCD built by AUO, usage is expected to account for as much as 60 % of lifecycle carbon emissions.
以華碩 N51V 筆電為例，在整個產品生命週期的碳足跡中，使用階段佔了 4 成左右（家用為 37 %、辦公室用 48 %），而由友達代工、已拿到碳足跡認證的 32 吋液晶電視，使用階段的碳排放更高達 6 成。