The best answer to the question above would be that it is a 'plot'. The sentence '<span>A man learns that his love for a dolphin is more important to him than his career.' is a plot because it is grounds or similar to the storyline. The theme hits on the main 'issue' and are generally broader (love, anger, sex, etc).</span>
Pollution plays a huge factor. With factories in demand, more and more substances are being released into Earth's atmosphere, resulting in higher temperatures.
