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.
Photosynthesis is an important process that permits plants, including trees, to use their leaves to trap the sun's energy in the form of sugar. The leaves then store the resulting sugar in cells in the form of glucose for both immediate and later tree growth.