The primary threat in this world is climate change because human being are experiencing numerous hurdles which includes bush firing, impacts on Ozon layer and glaciers mealting, and I believe all the major problems of lives is linked with climate change.
The change in our environment consequence forest fire which relase toxic gases. This is because as the global temperature of earth increased, the dry bushes easily catchs fire ,and it works live a fuel for fire. Therefore, it relases tones of carbon dioxide in our atmostphere which adversly effect on our natural sheild which resistance the deadly layers of sun to enter in our environment. Accourding to United Nation Organization, the holes in Ozon layer is expanding rapidly as compare to last decades.
The all problem of mankind is totally linked with Climate change because it is creating many obstacle for humans, it is mealting the ice block which is the major threats because it is the major source of fresh water and people have been utilizing it since it birth. Therefore, it will be hard to surive for human beings, if is not consider as the internation debate. However, there are some organization which are trying to figure out the best problems. For example, in pakistan, many plantation programs are engaged by government which aims to cultivate trees as much as possible through out the state.
To conclude, climate change is the biggest problem which linked every problems of this world which is damaging every field of life.