this is another anti smoking campaign trying to motivate people to stop smoking by comparing your lungs to trees by what they look like in spring and winter. it is a smart way of getting the point across as words is not needed as you can tell that the right side is what your lungs look like smoking and the left is what they look like when you don't smoke
Trees help to slow climate change. They also improve air quality in urban areas. Don't cut down trees for a new home or for yet more agricultural land to feed yet more animals for meat, or for palm oil plantations. Your daily choices (what you buy) affect what happens to trees.