You might ask "Why shouldn't you cut down trees?". After all, they do take up a lot of space, produce carbon dioxide, and require maintenance. So let's have a look at the factors involved in the 'why' question and try to explain what it is that you should be concerned about.
Trees need to be cut down in order to continue growing, and to keep their energy flowing into the atmosphere as carbon dioxide. In order to be able to do this they have to be allowed to grow naturally, and because trees are evergreens they are easy to take out. But you may not realise that when you cut down trees you are releasing CO2 into the atmosphere, which may well be enough to offset the benefit.
Cutting down trees also releases oxygen, and since oxygen is needed by all living things it makes sense to try and remove them from the earth. The plants that remain are going to be a major benefit, as they will feed the animals and birds and even supply some of the nutrients that are lost when you burn fossil fuels.
Burning fossil fuels releases poisonous gases such as carbon monoxide, nitrogen oxides, and particulates. In order to combat these, some manufacturers use a process called carbon black. As black as this sounds, it is actually one of the most effective means of controlling these, but unfortunately it is also highly flammable and can be hazardous if used improperly.
If you are wondering "Why shouldn't you cut down trees when you use carbon black, they seem to take out a lot of carbon dioxide, which is great, but they are still taking up a lot of oxygen in the process?" Well, you are probably thinking that the oxygen will return anyway, so perhaps this is better than taking out a lot of trees in the first place, but remember that oxygen is essential for plants to live, and without it they will die.
The nitrogen, carbon, and phosphorous that your trees are taking out of the air cause pollution known as NOx, and if you've seen the pictures of the smoggy London streets, you'll know what I mean. Also, there are other problems too that are associated with trees that are being cut down. They contain nutrients that are beneficial to the soil and the plants that grow on it, and also help to keep soil nutrients better than they would be without the trees.
So if you are looking for a way to save money, and you are concerned about the environment, then it might be worthwhile to think about what cutting down trees really means for you. The trees will pay for themselves very quickly in the form of emissions released into the atmosphere, but also in the form of nutrients that are taken out of the soil.
So there you have it, why shouldn't you cut down trees whenever possible, and also how much it costs us in terms of pollutants. You may be surprised to learn that the trees are only responsible for around 20% of the pollution in the UK, so the real culprits are the factories that make things for the factories.