Both have many structural similarities but by work they are different!
• One used to extract algae from water and use it as food which simultaneously maintains ecology.
• Another one extract soil from river basin for urbanization which degrade the ecology and land form.
• After all we are humans who forget the word humanity we can live without pure environment but can’t live without urbanization and development.
• And now an invisible virus took initiative to recover nature in which it start succeeding.