The notion of forcing and feedback is intrinsic to climate science.
For example, water vapour is a feedback to the forcing from greenhouse gases with the current episode of global warming. Earth is warming because of increased CO2 (the forcing), which causes more water to evaporate which, because water vapour is also a greenhouse gas, means even more warming (the feedback). Same with reduction of sea ice in the Arctic. More warming means more sea ice melts in summer (feedback), means less energy from the sun is reflected to space and more absorbed by the ocean, which means more warming.
This was discussed a day or so back in regard to ice ages. A trigger causes the earth to warm, the warming earth means more CO2 is released from the oceans (feedback) which causes more warming. This is what has been observed as reported in the paper in Nature.
Not sure why that is a difficult concept to grasp, nor why it would cause denmor to roll on the floor laughing. The notion of feedbacks and forcings is one of the first things that anyone who reads up about climate science would come across.
The quote from denmor's antigreen website (last couple of lines 'maybe the same thing is happening now') indicates the writer is not even aware that burning hydrocarbon releases carbon dioxide, or that the oceans are absorbing about half the extra CO2 humans are emitting (not releasing it).
Doesn't inspire any confidence in that source (nor does the anti-environment name of the website).
