And it's good for the planet, too: the trees absorbed carbon when they were growing up, and they gave off oxygen, and now that carbon is trapped inside the walls and it's not being released into the atmosphere.
ومفيدة للكوكب أيضًا: امتصّت الأشجار الكربون  خلال فترة النمو، و أخرجت الأوكسجين، و الآن الكربون عالق داخل الجدران و لم يُطرَح إلى الجو.