1. Samuel likes the UK, but he decided to study in the USA.
=> Although  Samuel likes the UK, he decided to study in the USA.
2. I spent the whole morning reading about global warming.
=> It took me  the whole morning to read about global warming.
3. Fuel price is increasing, so they want to save more energy.
=> Because  Fuel price is increasing, they want to save more energy.
4. Why don’t we tell everybody to save clean water and electricity?
=> We should  tell everybody to save clean water and electricity
5. Electric cars might be the best means of transport in the near future.
=> Electric cars will probably
6. The streets are too crowded in rush hour, so we’ll arrive late.
=> We’ll arrive  late because the streets are too crowded in rush hour
7. Why don't we discuss more about our environment project?
=> How about discussing more about our environment project?
8. Can you switch off all the lights when you leave the room, please?
=> Please  switch off all the lights when you leave the room