<i>1. Unregulated human overpopulation of Earth”</i>
Without meaning to sound harsh, if this is that big a problem, you could do your part and leave.

<i>2. Unwelcome human-induced effects of global warming in particular and climate change in general</i>
Lots to unpack on this one. Let’s start with “unwelcome” effects on global climate. Are you saying that the climate as it existed two years ago, or five years ago, or 100 years ago was the best of all possible climates, and that any deviation from this is undesirable? Dr. Pangloss and Goldilocks share your feelings on this one.

“Human-induced” effects…ever heard of sunspot cycles, or volcanos, or solar wind? Were all previous secular shifts in the earth’s climate (e.g. the Little Ice Age, the Medieval Warm Period, the Ice Age and so on) also anthropogenic in nature? Is it just the least bit possible that our current bout of “global warming” is pretty much a function of the recent short period, highly active sunspot cycles with only slight, perhaps insignificant, contributions from human activity, and that with the current lengthening of the period of the current sunspot cycle we may be on the cusp of dramatic “global cooling”?

<i>3. Human-driven pollution of Earth’s environs</i>
Since your concern expressed in #1 above has not yet prompted some personal sacrifice on your part, could you demonstrate your commitment on this one with an explanation of the following?

a) Do you own or ride in someone else’s automobile? (Cars are horrible polluters, you know.)

b) Do you ever fly? (Worse than cars!)

c) Do you use electricity? (Coal, natural gas, and don’t even get me started on nukes!!!)

d) Do you consume any food that you have not raised yourself in an organic garden plot? (Transporting food any distance causes terrible pollution.)

<i>4. Reckless dissipation of Earth’s resources by the human species, with particular attention to the challenges posed by peak oil and peak soil.</i>
You are aware that the Stone Age did not end because we ran out of stones, aren’t you? For the rest of this point, see #1 above.

<i>5. Relentless expansion of the unbridled global political economy.</i>
OK, you got me on this one. I understand every word of this sentence fragment by itself, but taken as a whole it makes no sense whatsoever.

I think what you are trying to say at the end is that we humans are a destructive virus on the body of poor Mother Gaia or something. I pity you. It must be a terrible burden to view yourself the way you do.

Let us take a moment to identify global challenges that are emerging and converging in our planetary home. Of course, this is a partial list to which other threats to human and environmental health can be added.

1. Unregulated human overpopulation of Earth
2. Unwelcome human-induced effects of global warming in particular and climate change in general
3. Human-driven pollution of Earth’s environs
4. Reckless dissipation of Earth’s resources by the human species, with particular attention to the challenges posed by peak oil and peak soil.
5. Relentless expansion of the unbridled global political economy.

These distinctly human activities appear to be overspreading the surface of Earth on such a gigantic scale and at so astounding a growth rate that scientists can make projections indicating a noticeable risk to life as we know it and to the integrity of Earth, perhaps in these early years of Century XXI. That is to say, Earth cannot much longer sustain unrestrained human population growth, unrestricted per human consumption and unchecked economic globalization without running the risk of precipitating some kind of global ecological catastrophe.