Could heat emissions cause global warming? I have calculated 6×1020J/a World heat production from human combustion, energy capture, waste heat and emissions to be 8.3 times greater than warming of oceans, land and atmosphere observed, but 216 times lower than solar forcing of 0.9 Watts per square metre assumed in a climate model (Trenberth 2009). The human effect is relatively small but cannot be ignored, because it acts like the last straw that broke the camel’s back and could cause global warming. Earth’s heat load is to absorb and radiate and a much larger quantity of heat day and night. That is relatively constant. The anthropogenic heat straws which add to the radiative camel are enough to shift the heat balance of the Earth, causing global warming.
Earth’s heat balance is certainly complex. Combustion emits carbon dioxide, water vapour and heat. Carbon dioxide has received most attention but heat probably causes most global warming. According to the greenhouse gases theory global warming is caused by carbon dioxide, but increased heat from Earth sources could cause warming, with solar radiation absorption and emission continuing as in the past.
Heat energy to warm Earth’s land, oceans and atmosphere, is emitted by respiration of living things, by combustion of vegetation and fossil fuels, by capture of renewable energy replenished by the Sun and by geothermal processes. Some heat produced is radiated into space, but my calculations indicate the remainder is sufficient to add to normal solar warming and cooling, causing warming noticeable near city heat sources.
Warming would not in the least be reduced by substituting for fossil fuels with solar, wind or hydro energy supplies because they are replenished from the Sun. Warming in the environment is caused by spent inefficient energy consumed. To reduce heat emissions enough to stop warming could require cutting energy consumption and waste to a low level, until entropy increase is prevented by energy removal in endothermic reactions, such as photosynthesis, which absorbs heat with light. Deindustrialisation may be necessary. The theory of warming by greenhouse gases is considered in my previous post here Greenhouse Gases Not To Blame.
My satirical book Animal Farm 2 explains paradigm-shifted climate science.
Sorry to contradict you, ABC SCIENCE, but this would not reduce energy consumption, which is a cause of global warming, as entropy. Combustion energy would have to be replaced by an equal quality of electrical energy. My ideas and a shifted climate science paradigm are on my blog martinknox.com
Combustion, geothermal processes, hydro, solar and wind, all produce heat energy (or electricity), plus water vapour, plus carbon dioxide (some). All the heat energy, including that wasted, ends up eventually in the oceans, land, atmosphere or reradiated into space. Energy taken by hydro, solar and wind technologies and their waste, warm the Earth and are replaced from the Sun. Increase of heat energy, or entropy released, in all these processes, is sufficient to explain the reported global warming.
Carbon dioxide is a mere 0.0042% of the atmospheric gases insulating the Earth from space. It does not act as a trace catalyst, like chlorofluorocarbon was explained to decompose ozone. Nor does it entrap infrared energy causing significant heating. To slow global warming, unnecessary energy consumption must be reduced. Part reduction replacing carbon fuels with wind and solar would increase warming.