A technology company has made a [new / newly] device to help clean the air in our home. The company is [calling / called] Dyson. It has just launched an air purifier [called / call] the Pure Cool Link. A spokesperson said the purifier captures up to 99.95 per cent of [pollutants / polluting] in the air in the home. Pollutants are the things that [dirties / dirty] the air, such as dust, smells, chemicals, pollen and smoke. This is great [for / of] people who have allergies or for those with asthma. A [specially / special] fan in the device cleans the air in a room in just 30 to 60 minutes. It also [continues / continually] monitors the air quality in the home to [automatically / automatic] keep it at safe levels. The device can be linked to an app so that users can control it from anywhere [on / in] the world. Pollution is a [growing / growth] problem in the world. However, most of us think pollution is only a [danger / dangerous] outside the home. This is not always [true / truly] . James Dyson, the founder of the Dyson company, said: "We think it is polluted outside of our homes, but the air [inside / insider] can be far worse." Hugo Wilson, the [lead / steel] designer at Dyson, explained why the air in our homes can be more polluted than the air outside. He said: "Modern [homes / house] have been built to be more [seal / sealed] against noise and trap heat, which means the pollutants we [creation / create] inside the home are also trapped and build up to [level / levels] up to five times more polluted indoors than out." The air purifiers will be [on / in] sale for between $500 and $650.