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The unit is designed for easy maintenance, making it a convenient solution for improving indoor air quality

Make sure waters always within reach: carry a bottle of water with you when youre out and have a mug of water on your office desk

One volunteer, Jeff Kirschner, talked about his online start-up, Litterati, which tries to get people to use their Instagram accounts to catalog the type and location of litter around the world

According to data compiled by the California Coastal Commission, which sponsors the annual California Coastal Cleanup, cigarette butts are the most numerous pieces of litter that volunteers find every year during the event

Therefore, many purifiers today will feature multiple filters stacked against each other to catch any particles that managed to escape

DiFranza et al., 2002)