In this sentence, the infinitive phrase functions as a noun and the subject. It is doing the action, to make. Infinitive phrases can function as nouns, adjectives, and adverbs. Here are examples of each. When an infinitive phrase acts as a noun, it can take the place of any noun in a sentence. That is, it can be the subject, but it can also be the object. Noun Subject Example: To eat ice cream for dessert would be wonderful. In this example, the infinitive phrase functions as subject doing the action of the sentence.
1 Trees Produce Oxygen. 2  Trees Clean the Soil. 3  Trees Control Noise Pollution. 4  Trees Slow Storm Water Runoff. 5  Trees Are Carbon Sinks. 6  Trees Clean the Air. 7  Trees Shade and Cool. 8  Trees Act as Windbreaks. 9  Trees Fight Soil Erosion. 10  Trees Increase Property Values.
When is it a fact trees are important for our survival, many people wonder of how much really a tree can contribute to the human species. Trees produce oxygen which is what humans inhale as well as they inhale carbon dioxide which is what humans create. The trees need us as we need them.