The main elements of organic compound is

Proteins, among the most complex of all organic compounds, are composed of amino acid  

Which contain carbon, hydrogen, oxygen, and nitrogen atoms.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint