Are trees harmful??

Trees are one of the only things that keep this problem in balance. They are a blessing, plant more, more, more!!!:)

I think that plants are not harmful, but is healthy. Plants produce carbon dioxide during night and produce oxygen during day,that is why healthy plants are a source of cleaner air,because plants release oxygen, they can bring the air quality of a room up several notches,placing these houseplants in the bedroom is not good for our health. Plant also good for our earth to prevent Global Warming

Trees are our greatest friends they convert co2 to oxygen, the amount they release at night is not the reason for greenhouse effect.

As others pointed out trees, along with other plants, convert carbondioxide over to oxygen. We breathe oxygen and expel CO2 and the plants do the opposite. It's how we work togehter. We need plants and trees to convert what we are expeling otherwise we would have run out of oxygen a while ago.

Trees take in Co2 during the day & convert it into oxeygen. If they release any at night it is only a small portion of what they absorbed during the day that they weren't able to use. You need do do more research & get your facts straight.

No, trees are not harmful, without them this earth would cease to exist. They help with shade, oxygen, and they are homes to birds and other animals.

no trees are not harmful

Trees and plants do, it is true, release a very little CO2 when they are not photosynthesizing. The net balance, however, is a production of oxygen. Nearly all of the carbon in plant matter is derived from the carbon dioxide in the atmosphere so trees, as they grow, are taking the carbon from CO2 and, for each carbon atom, release two atoms of oxygen back into the air. Trees lock up this carbon for a long time, sometimes millions of years, as they decay and turn into humus and then, eventually, coal and oil. It is humans who are largely responsible for releasing this carbon back into the atmosphere by burning fossil fuels. We have been doing this without a care at an alarming rate, especially during the last 100 years. This is a scientifically proven fact, verifiable by examining ice cores taken from the Arctic, Antarctica and from old glaciers (which are now retreating at an accelerated rate). I cannot understand how certain countries - America among them - refuse to recognise this fact and pull out all the stops to ensure that we stop suffocating our planet!

some trees r harmful but not every tree