What is the fine-grained topic of the following text: Its worldwide production is approximately 5 million tons per year, and besides being used in the manufacture of acrylic fibers responding for almost 50% of consumption, it is used in the production of ABS plastic (acrylonitrile-butanodiene-styrene) widely used in electronic equipment. Only return the topic.
Worldwide production and uses of acrylonitrile.