Global warming
The important reason for global warming is green house gas.Even we can not see the green house gas.Green house gas is absolutely important.Because it absorbs heat wave and infrared wave very well. As a result,world need to have green house gas for keep the average of world's temperature.But nowsaday,there's too much increasing of green house gas effects to everything in the world. Such as animal's life,There are many kinds of animal has became extinct because of the high temperature that cause by green house gas makes those animals can not live anymore. For human,green house gas effects a lot because in the land of agriculture can not produce food and vegetable for human.To solve the problem we have to help the world together.Such as drive under 90 km/hr for less consume oil or planting any kind of plants to increase the carbon dioxide gas. these things makes less green house gas and also global warming too.