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38 votes

Does human body temperature impact climate change?

Does human body temperature impact climate change? Directly? It's not even a blip. The Earth's population is 7.6 billion. With each person radiating about 80 watts (basal metabolism), that's about 600 ...
David Hammen's user avatar
  • 23.7k
14 votes
Accepted

What are those arrowlike underwater structures for?

Those are Yap Traditional Fish Weirs, according to islandculture.info In 2008, Yap State Historic Preservation Office (YSHPO) commenced a project to survey the fish weirs (aech) around the main ...
jeffronicus's user avatar
  • 3,489
10 votes
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How much mass has humanity added to the planet?

All mass used in construction on Earth comes from material on Earth. Since mass is conserved, there is no change. If we start harvesting material from the moon or asteroids for use in construction ...
f.thorpe's user avatar
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10 votes
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Can human activity affect volcanoes?

I think you have drawn the 'short straw'! As disasters go, volcanoes have about the least to do with human activity. Basically, volcanoes are the product of plate tectonics, which operates on a scale ...
Gordon Stanger's user avatar
10 votes

How much of the current global warming is due to human influence?

From the IPCC Fifth Assessment Report (2014 / current): It is extremely likely that human activities caused more than half of the observed increase in global average surface temperature from 1951 ...
elliot svensson's user avatar
9 votes

What are those arrowlike underwater structures for?

They look like stone fish traps or weirs. They are used by native poeple to catch fish on a large scale. They can actually vary quite a bit by culture and can be quite large. Here is a stone and ...
John's user avatar
  • 6,931
9 votes

Review of calculation of CO$_2$ contribution to warming

This reminds me of using Bjørn Lomborg's book in statistics, as examples how not to do statistics, his calculations never make any sense or just make unfounded leaps to conclusions. Erik seems to have ...
John's user avatar
  • 6,931
7 votes

How much mass has humanity added to the planet?

Don't confuse redistribution of mass with gain/loss of mass. There's a net loss of hydrogen and helium from the uppermost tenuous atmosphere. This far outweighs the incoming meteorites and ...
Gordon Stanger's user avatar
7 votes

Can human activity affect volcanoes?

Yes. Human activity can probably cause volcanic eruptions, albeit indirectly. Regardless, human activity affects volcanic disasters in several other ways. First, let's look at how humans can cause ...
Matt Hall's user avatar
  • 11k
7 votes

How did the Rhine originally look like? (before human intervention)

It would help if you'd ask a more clear question -- it's a dynamic river system so it is literally changing its shape every second! The story over long time-scales can be found on Wikipedia: https://...
Erik's user avatar
  • 1,999
7 votes
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Confused about whether physical impact is 'erosion'

I'm assuming here that you're asking whether you can apply the term ‘erosion’ to the damage your stone suffered, rather than the damage your floor suffered. In this case, the applicability of the term ...
Pont's user avatar
  • 5,429
6 votes
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With humans out of the equation, what could cause forest fire?

Wildfires are mainly caused by humans (or their technology) and lightning. Lightning is the most prolific natural source. There really aren't many other sources in most areas, unless there is ...
f.thorpe's user avatar
  • 13.6k
6 votes
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Rate of climate change with and without humans?

The Earth should probably be cooling, at least, that's what the Milankovich cycles and historical variation and recent temperature charts all indicate. See XKCD and related question on XKCD chart, ...
userLTK's user avatar
  • 5,857
6 votes

Why is it good scientific practice to 'build' a 'control Earth' from models, and where else do we 'build' controls?

It's true that, usually, when data is collected in an experiment scientists have a control, and very often not having a control results in a flawed experiment - that is, an experiment from which less ...
Pere's user avatar
  • 829
5 votes

Do flights affect tides?

Both airborne planes and the Moon affect the tides, but the effect of airborne planes is so small as to be negligible. From your sources the mass of a Boeing 747 ($m_{747}$) is $447.696$ $(10)^3$ $...
Fred's user avatar
  • 24.7k
5 votes

Review of calculation of CO$_2$ contribution to warming

From this he concludes that the temperature raise from carbon dioxide is only 1 °C × 0.30 × 0.04 × 1/4 = 0.003° C. His number for the amount of CO2 is high. A better value is 0.027 rather than 0.04. ...
David Hammen's user avatar
  • 23.7k
4 votes

Why is it good scientific practice to 'build' a 'control Earth' from models, and where else do we 'build' controls?

What do you mean by a control Earth? There is a control Earth: all of history until now. We don't know everything that happened on this control Earth, but we have some reasonable estimates of how ...
kingledion's user avatar
  • 3,376
4 votes

Can mining trigger earthquakes?

Yes. In addition to triggering natural earthquakes, (as pointed out by @hichris123) Mines can also be sources of artificial seismic activities due to mine collapses and/or explosives. Miners will ...
Eevee's user avatar
  • 485
4 votes

Do flights affect tides?

A plane might be located 1.3*103 meters away from the surface of the ocean right underneath it, but for most of the ocean, it's located much further away, and at a very different angle. While it may ...
Erik A's user avatar
  • 141
4 votes
Accepted

Is the maximum human population carrying capacity of Earth higher or lower than the current total human population?

The FAO estimate that we use 11% of the Earth's surface area for agriculture, and that that represents approximately a third of the land that 'could' be used (http://www.fao.org/3/y4252e/y4252e06.htm)...
Andy M's user avatar
  • 2,091
3 votes

What regions of the US will have *improved* climate given current predictions of climate change?

Answering my old question: I've found two sources that attempt to answer the GDP change brought about by predicted future climate change. The short answer is that places north of about Chicago should ...
mboss's user avatar
  • 81
3 votes
Accepted

How to improve this prediction about the climate in future?

The more carbon dioxide in the atmosphere the more global warming. The more global warming the more cloud formations that cool the earth [...] The effect of clouds on global warming is highly ...
Basileios's user avatar
  • 407
3 votes

Review of calculation of CO$_2$ contribution to warming

tl;dr– This sounds like silliness through-and-through. Addressing it as though it were a real scientific calculation would seem to be missing the forest for the trees. Temperature has raised by 1 °C ...
Nat's user avatar
  • 131
3 votes

Are there any studies that show that heavy metals escaped from landfills can cause any harm to human health?

The assumption is that these contaminants will leach into the ground and reach a source of drinking water. Or they will enter the food chain, by accumulating in plants, eaten by herbivores, eaten by ...
EarlGrey's user avatar
  • 461
2 votes

Could the Earth's core lose its heat?

The earth produces 20TW[1] of thermal energy from radioactive decay in the mantle. This is the amount of warmth that the earth generates, so it should give us a ballpark idea of how much heat we would ...
CL4P-TP's user avatar
  • 21
2 votes

Does human body temperature impact climate change?

Human metabolic heat doesn't add energy that was not already there. The metabolic heat human bodies produce comes from energy supplied by the food we eat. The energy in that food came from solar ...
Ken Fabian's user avatar
  • 2,120
2 votes

Does human body temperature impact climate change?

All the new energy added to the earth’s environment comes from outside our planet. The sun is the biggest contributor, then other factors like meteors, radiation from other energy sources in our ...
Mark's user avatar
  • 21
2 votes

With humans out of the equation, what could cause forest fire?

The same thing that typically cause them,.... Lightning. a very small percentage started by spontaneous combustion of dry fuel such as sawdust and leaves.
LazyReader's user avatar
2 votes

Aren't fresh water deposits renewed by the water cycle?

Rain water is still one of the most cleanest water sources available. There may be some ancient underground aquifers that have clean uncontaminated water. One issue with rain water is that ...
Fred's user avatar
  • 24.7k
2 votes

Aren't fresh water deposits renewed by the water cycle?

Where am I wrong in my assumption about natural water distillation (i.e. is rain water not as clean as it should be in theory)? Generally, rain water is pretty clean. That is not an issue. Plus, we ...
Bruzote's user avatar
  • 199

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