Recycle reactors are PFRs with a recycle loop. Switzerland developed an efficient system to recycle most recyclable materials. Bulawayo does not recycle waste water but uses treated waste water for irrigation. Many recyclers do not recycle e-waste responsibly. Its computer systems will recycle waste heat. IKEA stores recycle waste and many run on renewable energy. This approach views "restore" as a fourth component to the common reduce, reuse, recycle motto. By 2015, to recycle or compost at least 33% of household waste. As electronic waste, CRTs are considered one of the hardest types to recycle. It has been signed by numerous recyclers promising to recycle responsibly. It can therefore be used to recycle organic material. They are stored in the Recycle Bin. Grizzly bears can "partially" recycle their body wastes during this period. Because of budget constraints, the production crew will often recycle sets to save money. The system would also recycle the same dirty water through every cycle.