| godf said: But if other sources of greenhouse gasses have been reasonably constant, and we're now adding to it, then it really makes no difference what level of natural greenhouse gasses were required to maintain previous temperature levels, human emmissions can still have just as much impact, regardless of the ratios between the two. We only need a tiny % increase in the ammount of heat energy in the world to cause massive problems for humanity. Thinking 'Oh, less than 5% isn't that important' isn't really a sensible way of approaching things. |
This is spot on. People look at % values instead of the bigger picture, as in what would happen if that 5% wasn't there.
Look at it from another example.
If you were a healthy person and ate a burger and needed 30mins execrise to burn the energy off. Now add 5% more fat to the burger and you still only did 30mins exercise over a LONG time that person will gain weight. Now at the time 5% extra fat doesn't seem like much but it will have bad results on the persons health if he doesn't adjust for it.
Same thing goes for weather. Every few years we get wierd weather so it balances out what nature has contributed to it. However if it cannot blance out the extra 5% humans add to it, eventually that will build up and cause catastrophic things to happen.
