Examples of the three principles of sustainable include:
a. solar energy, which enables plants to photosynthesize and humans produce electricity
b. organisms and their ecosystems, the natural services they provide, and and the ability of the of organisms to adapt to changes in their environment
c. cultural changes such as the agricultural revolution and the industrial revolution, which in many ways enhanced human living conditions but had negative effects on the environment
d. the continuous cycling of chemicals, without which life would not exist