核心词组：
private car 私家车
traffic jam 交通拥堵
fog and haze 雾霾
hazy weather 雾霾天气
energy consumption 能源消耗
clean energy 清洁能源
alternative energy 替代能源
low-carbon technology 低碳技术
health 健康
green commuting 绿色出行
public transportation 公共交通
sustainable development 可持续发展
emission of carbon 碳排放
low carbon life低碳生活
carbon dioxide 二氧化碳
green economy 绿色经济
circular economy 循环经济
effective measures 有效措施
the amount of carbon emission 碳排放量
long-term environmental health 长期的环境卫生
short-term rapid economicdevelopment 短期快速经济发展
natural resources 自然资源
heavy transportation pressure 沉重的交通压力
alleviate the traffic jam 缓解交通压力
observe traffic regulations 遵守交通规则
break traffic regulations 违反交通规则
作文素材模拟范文：
As is portrayed in this picture, twosnails are climbing up a tree freely, and the higher one looking at a flow of carsbeing caught in a traffic jam, said to the other that “come on, see the crowdedcars, they are slower than us”。
What the pictureis intended to convey is that the swift developmentof private car meets with the requirements of public traffic, but also arousesthe negative externality. Heavy transportation pressure in many cities maybring much inconvenience to people and exert adverse impact on the environment.On the one hand, when traffic jam happens, short distance in the past now seemsto become terribly long, and drivers could do nothing but to wait. Therefore, alot of precious time has been wasted on the road. On the other hand, exhaustedgas emitted by cars has increased the burden of environment, especially airpollution. And therefore, the health impact of the pollution is becoming abigger concern in china's smoggy capital。
Therefore, effective measures should betaken to alleviate the traffic jam. Firstly, planned development of the numberof private cars should be carried out. Secondly, public transportation such asbuses and subways, which are low-carbon transportation means, should beencouraged and promoted. The effective implementation of the measures mustbenefit the coordinated development of society and economy, environment andecology。(来源：万学教育)
