Hi all, I have some questions concerning house plants... Home size: About 1,100sq ft apartment on an upper floor, 3 bedroom 1 living room 2 bath, kitchen, balconies. Indoor space that usually stays open is about 950 sq ft. Doors shut most of the time: balcony, bath, kitchen Inhabitants: 3 cats, two adult humans Windows: usually remain closed - pollution -cats Air purification: Electrolux A9 for living room, smaller one in bedroom A3. Location: Taipei, Taiwan Climate: Hot and humid summers - but with AC it is too dry I use a humidifier in the bedroom, humid cold winters. Humidity: Usually 45-80% in winter. With dehumidifer I can get get it down to 35-40% in the bedroom where the problem is. Problem: Bedroom CO2 levels recently have been ranging from 1800ppm to 2500+ ppm especially in the morning. Waking up with headaches. One morning Oximeter reading was like 92, I think it was inaccurate but scary. If the plants thrive on humidity then do I need to stop using the dehumidifier? And in summer with AC on it is too dry, so I have to use a humidifier I am looking for a variety of plants to resolve this problem. My thoughts are Boston ferns, maybe a couple of cacti on higher shelves where the cats cannot get them and/or some succulents. But... I am not sure what is going to work better. And how many I am actually going to need. Floor/hanging? Variety? And another thing is bugs.... once I have them, how do I control the bugs? Just with sticky paper? We have a huge problem, every time I try to have plants, even outdoors on a balcony I end up with crawling bugs all over my dirt that kill my roots and I have to throw out the plants! They have to be safe for cats, as I am sure the ones I have are going to try to eat them. Cactus needs to be up high in rooms they do not go, perhaps a bathroom or higher shelf, I have some places to put them. But our apartment is small, so there is limited space for everything. Suggestions? Thanks.