Scientists said that in the past 100 yea

Scientists said that in the past 100 years, as the global(全球的) temperatures went up by 0.74℃, the temperature in North China has climbed 1.4℃ in only 50 years.
China needs to cut down carbon dioxide(二氧化碳) emission(排放)，because it’s the main reason for global warming. The good news is that China has seen the importance of going green. China has decided to cut energy use down by 20% and pollution emission by 10% in the 11th Five-Year Plan.
Can you slow down global warming? Sure! You and your family can take some steps.
Here are some pieces of advice to help you save the earth.
Wear used clothes. It means that you save the energy when you wear your brother’s, sister’s or dad’s old T-shirts.
Change your light bulbs(灯泡). Use energy-saving light bulbs. And don’t forget to turn off the lights when you leave a room and turn off your television and computer when they are not in use!
Take a bus. Taking a bus saves a lot of oil(石油) every year.
Say no to plastic bags. The next time your parents go to the market, ask them to use baskets. Open the windows. Don’t use the air conditioner(空调). Let some fresh air in. When you have to use the conditioner,setthetemperature higher in summer and lower in winter to save energy.

The main  小题1:for global warming	Too much carbon dioxide in the air.
小题2: to save the earth.	1. Wear 小题3:  clothes.
	2. Use energy-saving light bulbs and  小题4: to turn off the lights and your television or computer when you don’t need them.
	3. Take a bus.
	4. Use baskets instead of plastic bags when you or your family go 小题5:
	5. Try to use the air conditioner less.