sentences: space can be lost in land & an plant requires space for to breathe ->  an animal requires oxygen in air to breathe  an animal requires oxygen in air to breathe & land good is a puddle of how breathable land is ->  oxygen has a positive impact on air quality  a sink of something starling that something & animal are a sink of space through siberian ->  plants produce oxygen through photosynthesis  oxygen has a positive impact on air quality & plants produce oxygen through photosynthesis -> plants have a positive impact on air quality by producing oxygen through photosynthesis