I know it's horrible and gives you a dark day talking about the end of the world, but I can't help speaking it out, as I am so much troubled with this stuff.
Have you watched, heard, or read any news about global climate change, etc? It's a kinda hot issue now. When you read the International Herald Tribune, for example, you'll see these things have been published almost every day, whether it's about the intergovermental panel, the mayors movement (both on climate change), the losing islands caused by rising sea level, etc. It ladens me, indeed. So perhaps what I'm gonna do here is listing those things that worry me, in title "How the world ends".
Well, the conclusion I've made from various sources is that the world, whether you like it or not, however, somehow, will gonna end by either these things:
1. The All-used-up Energy of the Sun
I'm sure you all know that the sun is not eternal. We can of course still be exposed to its heat, which we need for life, in the next 5 billion years. But, after that, well, the earth won't be saved. We're gonna die, however, for if the sun don't shine anymore, what could a human do to survive?
2. The Rising Temperature of the Earth
Ok, the first thing might be too long-term stuff to think about. but, about this one, the rising temperature of earth, I believe it could only take several hundreds years ahead for the world to end by this.
The temperature on earth is rising from 0.2 to 1 Celcius degree per year. I live in Indonesia, which, let's say the approximate temperature is 30 Celcius degraa. Now, it means that if I suppose the rise is 0.5 Celcius degree a year, then it'll be 35 degree in the next ten years. What about in the next a hundred of years? Well, with the same calculation, Indonesia will be as hot as 30 + 50 degree, or 80 Celcius degree.
Can you imagine that? It's only a hundred years from now. human can't live at such a hot temperature.
Well, you can still think that we might be able to adapt later, so we can be what one of the thermophillic creatures (creatures living at high temperature habitats). But, 80 Celcius degree is far too extreme. I don't think we can live at that temperature.
3. The Rising Sea Level
As the earth is getting hotter, the ice in the north and south pole will melt down, that will lead to rising volume of the sea water, and finally on the rising sea level. since 1992, the sea level is rising approximately 3 mm/year. What's the consequence?
Well, first, some smaller islands will get drawn, disappear from map. I read this news about an island state in Pacific Ocean is being threatened by this losing from world map because of this problem. Now, can you imagine, in the next 100 years, when the earth temperature is 80 Celcius degree something, how high the sea level would be? If there's no acceleration, of course the sea level will be 300 millimeters or 30 centimeters higher from now. But, you know, it would be 50 Celcius degree hotter than now!
4. The Hole on Ozone Layer
It's reported that the recent ozone levels have dropped to 33% of their pre-1975 values. Thsi is mainly caused by CFC (chlorofluorocarbon) gas produced by air-conditioning and refrigerator. The consequence is over-exposing radiation of the sun onto earth creatures. Until now, the impact on human being is still around skin cancer, but, you can imagine what worse things can ever happen if the hole is getting bigger and bigger.
To be continued...
