The large-scale world war you mentioned will not happen in recent years, but wars between various regions will continue to happen, such as the Lebanon-Israel war, the Palestinian-Israeli conflict, the Iraq war and so on. Although China's slogan is "peaceful rise", there are still some radicals who make all kinds of false statements about China, leading to all kinds of disputes. The future war is hard to predict. If we take precautions, we can better defend our country and ourselves by receiving national defense education.
In order to make people live a better life, the government is speeding up economic construction. At the beginning of the reform, the national living standard was low. Do you still talk about environmental protection if you don't have enough to eat and wear? Who knows what environmental protection is? We must admit that development at the expense of the environment cannot achieve sustainable development. Besides, with the worsening environmental problems, people all over the world are discussing how to protect the environment, not just in China. In fact, you don't have to wait for someone else to do it. You can also start from yourself and slowly change the people around you. "Don't wait for the world to change you, but influence the world yourself."
/kloc-the landlord of 0/6 years has not yet entered the society, and the society is very realistic. When the landlord goes to college, he will naturally have a different understanding when he comes out to work. At best, you are like those angry youths now. When you meet reality, you will know how cruel it is.