Yes our planet our echo system face may challenges. Out societies are under stress. The international community is a jungle in which the strong pray on the weak and proclaim democracy and justice. Out societies are overwhelmed with sectarian, political, ethnic and racial fragmentation.
Political leaders, business leaders, artists, writers, ....have not been able to solve our most dangerous and most costly challenges such as pollution and global warming.
The youth can save us in the long if they can do two thinks that the national governments and their parents generation don't approve.
First, the youth can help reduce the burden of overpopulation by making a commitment to have no more than one child. If a large number of young adults have one child or less, population growth will slow down and perhaps we might witness a population reduction for the first time since 18th century. Imagine how nice our world will be if we can role back the human population to five billion. There will be more space and more resources per capita. We can even offer more space to plants and animals.
Second, the youth can help reduce fragmentation and war and hatred by marrying outside their ethnic, caste, race, religion. Imagine two tribes that have a ling history of war and hatred and killing one another. If the youth of these two tribes start marrying each other after two generations there will be so many mix children that war and violence between the two tribes will become unimaginable.
Third, the youth can save us by resisting the temptation of materialism and wasteful consumerism. Having a bigger car! Having a larger home just for sake of achieving a higher social status. It is better to live a comfortable life with the minimum waste of resources and causing less pollution. Abandon the obsession with materialism. Work hard and try to be successful. But don't don't respect people more just because they have more wealth and more material possessions. Don't envy anyone as long as you have enough income and wealth to enjoy security and peace ming.
Adopting these values and taking these steps is difficult. It will upset the elders and parents of young men and women. Yes it will! But it will be well worth the effort.