Global warming is an urgent problem in environment problem. Earth’temperature is rising by degrees every year.If Earth'temperature continues to rise, it will happen in a big disaster. That's why we have to do us best.First of all, It is important not to take out garbage.The carbon dioxide which comes of garbage causes Global warming.Second,Exhaust gas is seldom taken out. If this has a car at all,it is impossible. So I think a solar car should just spread. It is important to also a small thing.