It is now a scientifically well accepted fact that our Climate is changing and that Human activities like burning fossil fuel, industrial emissions and deforestation are responsible for major part of it. 

United Nation's Intergovernmental Panel on Climate Change (IPCC) has issued urgent warnings to reduce our Global greenhouse emission which have already shot the Carbon concentration in our atmosphere  to dangerous levels of 387 ppm (parts per million) as compared to 280 ppm before the industrial age and is rising at a rate of 2 ppm per year. This is causing temperatures to rise across the globe creating weather extremities and huge risk for future of our civilization.

To avoid this disaster, we need to urgently reduce global carbon emissions (which hit about 10 billion tons in 2010) until they are equal to or less than the amount of carbon captured and stored by the oceans and plant life (which removed about 4.8 billion tons of carbon in 2010). It's just like water in a bathtub — unless more water is draining out than flowing in from the tap , eventually the bathtub will overflow . 

However, the bigger challenge is to do that while ensuring growth and development of our civilization especially in developing and under developed countries of Asia and Africa, which means we all need to act quickly, decisively and smartly on this issue