Overpopulation. China has the highest population in the world, about 1.2 billion or twenty one percent of the world’s population reforms are needed to ensure that China’s population will not continue to grow.
reducing the using of vehicles, cutting down the using of machineries and planting trees
we should re-use and recycle them as possible as we can instead of producing more products.
Planting trees. Trees convert carbon dioxide into oxygen, cleaning up air pollution every day, so we have to reduce cutting down of it. Become a person who respects life rather than the one who destroys it.

Using Public Transit Transportation: Use your vehicle a lot less often. Carpool and rideshare when you have the ability to do so and consider using public transportation
consider buying the most efficient, and least polluting vehicle. In general, newer models are less polluting as they are developed with the latest technologies. Be sure to keep car tuned and regularly replace air filters at recommended intervals.
Use eco-friendly products in your home
When purchasing household products for your home and your yard, opt for the cleanest and greenest products that don’t contain any harmful polluting chemicals.

Choose sustainable products
Support companies that are committed to sustainable manufacturing practices and reducing pollution in the air.

Become interested in local matters
Support public policies and representative politicians who will work to protect the air and the environment.
Become a person who respects life rather than the one who destroys it.
Contribute: See if your state or local government already has initiatives that could end up helping you to contribute to making the air quality in and around your area better than it would have been otherwise.
Talk to Local Representatives: Talk to your local representatives and government officials about the concerns that you have related to the clean air issues in your community and encourage them to act on it and take care of those issues so that we can leave our world a better place for our children.
Educate Your Companions: Let the people around you know about how they can contribute to clean air initiatives and educate them about all of the different ways that they can take care of the environment themselves.
Do Regular Car Check Up: Its important for you to go for regular check up of your car to make sure it does not consume extra fuel. This will not only save you money but your car will also last longer.
Buy Energy Efficient Vehicles: Buy vehicles and other items that are helpful to the environment. There are so many options that you have now that are either efficient on gas or they are hybrids, so you don’t have to worry about them putting additional gas and pollution into the atmosphere. If you’re looking for a new car, go energy efficient if you can.
Buy electricity generated from renewable energies i.e. hydroelectric, wind or solar power