Global climate change is identified as one of the greatest threats to the planet. Governments and scientists alike have agreed that the problem is real and serious. There is a worldwide consensus among climate scientists that global average temperature has raised about 1F (0.4C –0.8C) in the past 140 years.
The 1990s were the hottest decade of the entire millennium and the last 5 years were among the seven hottest on record. Spring arrives approximately 15 days earlier than it did 30 years ago.
Climatologists have found evidence to prove that there are a few factors responsible for natural climate change such as ocean currents, volcanic eruptions, etc. The greenhouse effect as we see in the slide is a natural occurrence without which it is certain that we would all be lost because the earth would become an ice planet. However, too many greenhouse gases in the earth’s atmosphere could increase the greenhouse effect. Right now, there is about 40% more carbon dioxide in the atmosphere than there was at the dawn of the industrial revolution. This is expected to double or triple in the next 30 years.
It may interest you to know that livestock contribute significantly to the methane emissions of nations such as Australia and New Zealand.
You may see the pie chart, which shows land-use patterns that contribute approximately 9% of emissions.
Yet another contributor to greenhouse gas emissions is war. War devastates large areas of the globe, while releasing huge amounts of greenhouse gases into the atmosphere. The ongoing Iraq War is a potential threat since destruction of oil fields has released millions of tons of carbon dioxide and other, even more potent, greenhouse gases into the atmosphere.
If you are already depressed by hearing what I said now just wait until I complete examining the effects of global warming.
All things important to our existence on earth – ecological systems, water resources, food sources, coastal systems, health and human settlements – are...