Bifferwine
New member
When I was a grade school student we were taught that an ice age during our lifetime was a very real possibility. In high school we were told that because of the depleted ozone layer we would all die from cancer due too much UV reaching the earth's surface. Now the same people of the same political persuasion are trying to sell me global warming?
I am not denying there has been warming because there is evidence. There is none that indicates humans are the major reason. I also find it interesting that other planets in our solar system have experienced global warming. How do you explain this?
Wow. As a scientist, and as a person who has taught science at the university level, this lack of basic understanding is appalling.
The ice age thing: the earth is currently in a natural cooling phase, if we follow the historic and prehistoric cycles the planet takes. 40 or 50 years ago, if the earth had taken its natural path and followed the natural cooling and warming cycle that it always has, it would indeed be cooling right now. We are supposed to be in a downturn. But for some reason, it keeps getting hotter -- contrary to the part of earth's natural cycle that we are in. So yeah, had global warming not kicked in, we would be getting cooler right now. The evidence for global warming didn't start piling up until the 80s and 90s. Before that, people had reason to believe that the earth would follow its natural cycle. Now we know better.
The ozone layer: The reason the ozone layer has been able to heal itself and the horrible things you were told would happen didn't happen is because humans DID heed the warnings of scientists. The overwhelming evidence about the ozone hole caused 196 countries to sign the Montreal Protocol, which banned the worst of the ozone-depleting chemicals. The Montreal Protocol is considered one of THE most effective international agreements ever. Not just environmental, but overall. Since it went into effect in the late 80s, the ozone layer has been able to slowly heal itself. Not because ozone depletion doesn't really exist and is a political scam, as you say. But because the substances that cause it were banned all over the globe!
There are MOUNTAINS of evidence showing that humans are the primary cause of global climate change (not just global warming). From tons of different lines of evidence -- not just one source. As to your assertion about other planets, well other planets undergo warming and cooling naturally just as earth does. The difference is that for the last few decades, earth has been warming when it should be cooling, every year it keeps getting worse, scientists are beginning to see changes in species' behaviors and survival rates, and it can be very clearly attributed to human causes.