1. Because of **global warming** our planet gets hotter and hotter.
2. The oil spill near Alaska in 1989 was the worst case of water **pollution** in history.
3. **Cyclones** are very common in South East Asia.
4. There are a lot of **endangered** species on the planet.
5. We say that people live in **poverty** when they don't have enough money to pay for their food or housing.