# Unit 4: Global Warming

> Từ vựng và mẫu câu Unit 4 (Global Warming), i-Learn Smart World 11: If we don't …, … will … / … has increased by …%.

Source: https://olyclass.com/library/tb-ilearn-smart-world-g11-u04/

- Subject: English
- Level: B1
- Textbook unit: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=tb-ilearn-smart-world-g11-u04
- Copy and edit it: https://olyclass.com/library?copy=tb-ilearn-smart-world-g11-u04
- Games it plays well in: [Line of Four](https://olyclass.com/classroom-games/line-of-four/), [Prize Climb](https://olyclass.com/classroom-games/prize-climb/), [Hot Seat](https://olyclass.com/classroom-games/hot-seat/), [Sentence Race](https://olyclass.com/classroom-games/sentence-race/)

## Words in this game

- **approximately**: The trip takes approximately two hours by bus.
- **area**: This area has many tall green trees.
- **biofuel**: Some buses use biofuel instead of petrol.
- **carbon dioxide**: Trees take in carbon dioxide from the air.
- **consume**: Big cities consume a lot of energy.
- **dam**: The dam stops the river and stores water.
- **emission**: Car emissions can make the air dirty.
- **fossil fuel**: Coal is a fossil fuel.
- **global warming**: Global warming makes our planet hotter every year.
- **hectare**: The farm is ten hectares in size.
- **impact**: Plastic has a bad impact on the sea.
- **prohibit**: The park prohibits cars to keep the air clean.

## Questions

1. If we don't stop global warming, the ice ___. (has melt / is melt / melted / will melt)
   Answer: will melt
2. If we don't reduce emissions, the air pollution ___. (got worse / has worse / is worsen / will get worse)
   Answer: will get worse
3. The number of cars ___ by 40% since 2000. (has increased / increases / increasing / will increase)
   Answer: has increased
4. The city's energy use has increased ___ in five years. (at 20% / by 20% / of 20% / with 20%)
   Answer: by 20%