However, less dangerous chlorofluorocarbons are released into our atmosphere with minimal usage of trucks and other shipping vehicles from online companies like Amazon, Ebay, Etc. From calculations less dangerous chemicals are emitted with one deliverer. Many fuel efficient truck on average, "e-commerce uses about 30% less energy than traditional retail, according to studies,". How much emission is burnt from a single truck driver compared to multiple customers driving somewhere for their products? Recent studies show there is Less CO2 emission in commerce by Amazon delivery trucks by 32% using minimal supply of gasoline compared to numerous customers. Online shopping can slow the decay of global warming by reducing the amount of chemicals released in the atmosphere that could damage civilization. Especially with the evolution of technology, purchasing online to download is the main reason for eco-friendly shopping. With downloading online, no packaging is needed to be prepared for the store. On websites that sell videos and books like E-Books they are environmentally friendly when, "They displace the purchase of 22.5 physical books," .