Ecologists
worry that the world's resources come in fixed amounts that will run out, but
we have broken through such limits again and again
The Wall
Street Journal
How many
times have you heard that we humans are "using up" the world's
resources, "running out" of oil, "reaching the limits" of
the atmosphere's capacity to cope with pollution or "approaching the
carrying capacity" of the land's ability to support a greater population?
The assumption behind all such statements is that there is a fixed amount of
stuff—metals, oil, clean air, land—and that we risk exhausting it through our
consumption.
"We
are using 50% more resources than the Earth can sustainably produce, and unless
we change course, that number will grow fast—by 2030, even two planets will not
be enough," says Jim Leape, director general of the World Wide Fund for
Nature International (formerly the World Wildlife Fund).
But here's
a peculiar feature of human history: We burst through such limits again and
again.