Trees during photosynthesis consume carbon dioxide and produce oxygen. A hundred year old beech tree produces enough oxygen in an hour to last three people for an entire year. The average tree during its life consumes around 24 million cubic meters of carbon dioxide, one of the main greenhouse gases responsible for global warming.
Trees are important regulators of temperature and climate.
One hectare of forest gives off up to 350 liters of water per hour, and thus on hot days can decrease the local temperature by several degrees. Trees capture dust and microorganisms. A hectare of spruce trees can capture up to 32 tons of dust, and the same area of beech forest can capture even twice this amount. Trees produce substances that kill disease-carrying germs just like antibodies. Trees reduce noise.