1 The epoxy mixture has cured to a solid state and can be dry sanded and shaped. 2  You should not be able to dent it with your thumbnail. 3  At this point the epoxy has reached about 90% of its ultimate strength, so clamps can be removed.4  It will continue to cure over the next several days at room temperature.he time it takes for this transformation is the cure time. As it cures, the epoxy passes from the liquid state, through a gel state, before it reaches a solid state (Figure 1). As it cures, mixed epoxy pass from a liquid state, through a gel state, to a solid state.
But the population factor in ânaturalâ disasters is not just important in poor countries, as overpopulated/overexposed East Coast areas in the United States learned during Hurricane Sandy. In the United States, infrastructure development is not keeping up with population growth.
Slowing the rise in human numbers is essential for the planet--but it doesn't require population control. By Robert Engelman | May 17, 2009. In an era of changing climate and sinking economies, Malthusian limits to growth are backâand squeezing us painfully. Whereas more people once meant more ingenuity, more talent and more innovation, today it just seems to mean less for each. Less water for every cattle herder in the Horn of Africa.