【正确答案】正确答案： As illustrated by the picture, the basic mechanism of greenhouse effect is the trapping of more heat than the usual to the atmosphere around our globe, causing the temperature to become higher than it otherwise would be. As listed in the picture, the movement of energy and heat between the sun and earth is balanced by nature"s design, and the same as the greenhouse gases. The problem right now is that human activities are adding more greenhouse gases into the nature which consequently produce more heat than necessary. On the other hand, fossil-fuel consumption, environmental pollution and many other factors alike are responsible for the situation faced. In addition, the picture also clarifies that the primary greenhouse gases are water vapor, carbon dioxide, methane and so on. To get the problem solved, the most effective measure is to promote low-carbon concept to a more general public, such as using air conditioner reasonably, choosing to buy environment-friendly products. Moreover, only by raising the awareness of environment-protection can we have the possibility of controlling the effect.