5. 3. SUSTAINABILITY
It refers to those biological systems that can preserve
diversity and productivity over time.
6. 4. RECYCLE
Recycling is a process whose objective is to turn waste into
new products or raw materials for later use.
7. 5. Climate change
Climate change, also called global warming, refers to the rise in
surface temperatures on Earth. Nowadays, climate change is the
most important environmental problem facing humanity.