• Question: Do you think Global Warming exists and please back up your answer with evidence :D

    Asked by alexvotier to Darren, Deuan, Duncan, Lori-An, Michelle on 24 Jun 2010 in Categories: . This question was also asked by blathnaid, laurenf.
    • Photo: Darren Nesbeth

      Darren Nesbeth answered on 18 Jun 2010:

      I’d have to Google the evidence as I’m not familiar with it.

      I’d say that, even if Global Warming does not exist – all this eco-, environmental, green activity is doing no harm. It’s probably doing some good! So I’m all for it – as long as it’s fair and not just another way of showing off how rich you are by buying Organic rather than Basics/Value brands in the supermarket.

    • Photo: Lori-An Etherington

      Lori-An Etherington answered on 18 Jun 2010:

      Hi, good question. There are valid arguements for both sides. No one disputes the fact that over the last century the surface temperature of the Earth has increased (by about 0.6 C) however some think that this is due to global warming (defined as ‘warming of the earth by greenhouse gases emitted into the atmosphere naturally or by mankind’), whereas others think this increase in temperature is simply a natural phenomenon. I personally believe in the effect of Global warming due to the gradual build up of gases as this has been shown to happen through fossil fuel burning and deforestation, which then act to trap heat inside the atmosphere.

    • Photo: Duncan Hull

      Duncan Hull answered on 18 Jun 2010:

      Some of the most important evidence for global warming comes from the Mauna Loa Observatory, where the concentration of Carbon Dioxide in the atmosphere has been recorded since 1960. See http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earth%27s_atmosphere

      This provides clear factual evidence that the concentration of carbon dioxide in the atmosphere has steadily increased and is higher than at any other time for a long period.

      Since we know that Carbon Dioxide is a greenhouse gas, it is highly likely that the observed increases in global temperature are due in part to this increase in CO2.

    • Photo: Michelle Hudson

      Michelle Hudson answered on 24 Jun 2010:

      I do think that the climate is changing and there does seem to be evidence that overall temperatures are increasing such as the melting of the ice caps. Unfortunately, climatology and ecology etc. aren’t really my field so I can’t say if it’s more humans’ fault or more natural fluctuation. We probably have had some effect but I don’t know how that can be measured and compared to natural changes. I’d have a look in some of the other zones there might be a few specialists in the competition that can give you a better answer, sorry.