ruffrecords said:
I agree, but renewables are not cheap energy. We really need cheap portable energy. The elephant in the room is the exploding population. We really do need to get out among the stars and start colonising and for that we need fusion. Unfortunately too may people are blinkered by short term small problems like the mythical AGW.
Me too but I do worry for my children and grandchildren.
Cheers
ian
The science of the 'greenhouse' phenomena is real as a fundamental process. That means increased concentrations of different atmospheric species change the greenhouse effect of the atmosphere, leading to a difference in the energy retained - i.e. higher temperatures. CO2, CH4 are known greenhouse gases.
At one time the earth had very high CO2 and much higher surface temperatures. The lower levels of CO2 we have now means there is a significant amount of carbon stored somewhere (... fossil fuels)
Humans have a population size and effect on the earth's surface that is obvious - how can one dismiss any significance on the global energy balance? Deforestation, fossil fuel conversion, etc... are significant in consideration of the size of the earth.
In my opinion, burning a stored energy content of carbon (fossil fuels) and converting it to CO2 in a blink of the eye compared to geologic time will most likely have a significant effect on the earth's energy balance. Reversing this carbon conversion is something the earth can do but only in 100s millions of years - not in a timeframe sympathetic to humans.
For the current and preceding 2 or 3 generations of humans to have made the earth potentially uninhabitable for humans in the near future (so that other planets need to be colonized???) is pretty impressively terrible.
Other than political, financial, or an emotional attachment to the status quo, I do not understand anyone being able to disregard the human impact on the earth's energy balance as 'mythical'
Carbon pollution is no different than other kinds of pollution - where vested interests put great effort into slowing or stopping regulations to protect their profit margins.
At best, people who understand science and thermodynamics (greenhouse effect), might argue the effect of humans is not significant
yet in comparison to other variations, but evidence indicates that it is.
Solar conversion to electricity has the potential for nearly unlimited cheap energy with the right technology. Unfortunately the opposition to this technology development has been powerful and effective.