Environment and Human Global Warming
Human Global Warming has a neglible effect on the environment. The main driving forces behind global temperatures are the sun and cloud cover. The sun is a super massive hydrogen bomb that has shelf life of about 8 billion years. We are over half way in the suns life and the suns effect has been highly variable over this time. Life didnt even exist on Earth for the first 4 billion years and only began to evolve 600 million years ago, as the sun slowly cooled. In all this time, the climate has swung from one extreme to the other and is responsible for a string of mass extinctions. The suns variability in power output is most likely to be the main cause of these climatic swings. Large Volcanic eruptions have, even in the recent past caused drastic temperature drops, as the suns rays do not penetrate the atmosphere from the volcanic ash plumes that encircle the Earth during and after a major volcanic event. Cosmic rays are known to have a major effect on cloud formation on Earth. The science is in its early days and its difficult to make conclusions about the relationship between cloud cover and cosmic rays and global temperatures at this stage, but once again we are not going to be able to control cosmic rays.
Humans cannot control the sun, cosmic rays and hence cannot control the weather. Humans therefore cannot control global warming or global cooling. Its going to happen no matter what we do.
CO2 is a greenhouse gas. Greenhouse gases tend to allow in heat from the sun and trap that heat in the upper levels of the atmosphere, most particularly in the troposphere. Climatologists have recently been trying to find out if the troposphere is heating up with satellite and weather balloon data. The findings are remarkable in that the lower atmosphere is heating up, whilst the troposhere is heating much less in comparison. This evidence suggest that the earth is not currently heating up because of greenhouse gases in the atmosphere. Therefore elevated levels of atmospheric CO2 in the last 100 years is not the cause of global warming.
Greenhouse gases in our atmosphere are essential for our continued existence. Pumping CO2 into the atmosphere has only a neglible effect on greenhouse global warming. The biggest greenhouse gas by far is water vapour. Without an extensive blanket of water vapour the earth would be too cold to harbour life..
Global warming is a not a threat to our existence. Very rapid temperatures swings are a threat though. This has occured before in the past. We are living in what is called an interglacial period of the earths history. The earth has been swinging from ice age to warm periods like today and even to much warmer conditions. The last time the earth was as consistently warm as today for an extended time was the Eemian Interglacial period peaking 125000 years ago. The warm period lasted for 17000 years, sea levels were 15-25 feet higher than today and trees were growing north of the Arctic circle. Huge areas of the planet were transformed from ice to lush forest and back to ice again. Temperate areas with lakes turned into deserts and then back again. As a species we were not around to witness this extraordinary climate shift.
Homo Sapiens didnt appear until 100000 years ago in Africa. Every human carries a genetic marker that suggests we were nearly wiped out 72000 years ago with a global population of a mere 2000 individuals. In most of our existence the human race has evolved in much colder times than now. Only the last 10000 years has there been a life without glaciers in the northen hemisphere and as a result humans have flourished with many awesome inventions, discoveries and innovations.
With the knowledge that we are lucky to be living in a warm time of an interglacial period, it seems odd that we are trying to find a way of halting climate change. We dont want it to get warmer, because we might see some deserts expanding and we could lose our beachfront homes under the sea. Some small islands in Micronesia and the Indian Ocean may also disappear beneath the waves. Its a shame, but there is nothing that anyone can do about it. Just as nobody can stop the next ice age. It is expected that the northern hemisphere will succomb to another period of glaciation as early as the next 3000 years. Its unlikely that the human race will cope very well when we get a sudden temperature drop. It would require a mass migration towards the equator and a pretty slick agriculture and farming policy just to keep some of the population alive.
Human Global Warming