Over population….
From the recent climate change going on in the world, it has been proven that "over population" is one of the strongest causes of global warming. The countries in the world that have already been affected greatly are China and India, where both are in great need of help to control global warming.
Trying to control the over population that is causing global warming, China has put strict rules for parents. The rules are that they must pay a high fine for having a third child to the government. But this has not stopped the Chinese population to grow; in which an advantage and a disadvantage came out of the growth in the population.
An example of the advantage is that factories have a big number of national workers, making the Chinese a talented population. However, the amount of chemical gases coming out the factories spoils the climate, leading to pollution and harming the health of the population.
On the other hand, India, a country rich with its culture, is affected by global warming and there is not much done about this issue. Unfortunately the country is deeply affected by global warming. The proof is seen through the rate of deaths happening per year. All are caused by pollution. The reasons are over population and the use of chemicals in factories, cars, motorbikes, etc…
Over population is not only happening in the above mentioned countries, but it has began all around the world. Unless it will be controlled, the world will go through global warming. Sadly we are all involved in the cause of global warming. 
World Population Growth Graph

The growth in population is very much bound up with poverty, and in turn poverty plunders the earth. When human groups are dying of hunger, they eat everything: grass, insects, everything. They cut down the trees, they leave the land dry and bare. All other concerns vanish.