I recently heard a presentation on climate change by a respected geologist. In summary: The earth’s climate (including temperature) is the result of complicated interactions between a number of interstellar and geological phenomena including solar radiation (increasing), the earth’s solar deflecting magnetic field (decreasing), the earth’s tectonic platelet movements (effects ocean temperatures) as well as heat trapping greenhouse gases.
The earth’s climate history is clearly disclosed in the rocks. The one constant is that over the millenniums the climate has been constantly changing. Temperatures have varied over a 16 degree C range. The temperatures today fit well within those records.
So far we have not been able to understand these interactions well enough to obtain a model that accurately predicts future change. To assign all change to a single source is absurd. By doing so the media has deflected attention from the most serious problems affecting our planet, those of overpopulation and poverty.
These two problems result not only in increased greenhouse gases but also reduction of the foliage required to reduce CO2 and the habitat of other animal species.
If Pope Francis really wants to improve the environment he needs to change his church’s teaching on birth control.