So what is the greatest threat that mankind is facing. I guess I have lost touch. All this while, I still think that the depletion of the ozone layer is the threat because, by depleting the ozone layer we allow all the harmful rays of the sun to enter our atmosphere thus causing cancer or other skin diseases.
However, as I watch the show - Al Gore's "An Inconvenient Truth" , it talks about global warming. Apparently global warming is different from the ozone depletion. The global warming is actually the rays of the sun that are deflecting from earth is not able to escape the atmosphere.
For those who have not watched the show, I encourage you to watch it. The message it is trying to convey is critical to our survival as a species. According to the show, the recent disasters which we are facing in recent years can be linked to the global warming - primarily diseases like SARS and recent disasters like Kathrina and recent earthquake.
If we don't pay attention to the warnings and take action now, it will mean the end of our survival as a species.
According to a colleague of mine, the depletion of the ozone layer has been captured with the control of the ozone depleting chemicals. I wonder if this is really true or are we facing many different threats (most of which are self incurred).