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Like too many fruit flies in a bottle, there are now so many humans on this finite planet that we are changing our environment to be less favorable for a comfortable and enduring future. And, although we try not to alarm folks, any ecologist worth his salt knows that at some point density-dependent mortality factors eventually kick-in that keep populations from overshooting their environmental, or planetary, carrying-capacity. Certainly, our technology and cleverness have helped us elevate our species’ carrying-capacity, but our explosive population growth will soon outstrip these advantages as we exceed planetary boundaries. While there is much Earth-angst and hand-wringing over a long list of environmental issues, five green issues really and truly deserve serious attention and action by our species if we are to dodge excessive loss and adversity.