Though the primary focus of ACE is on climate breakdown, it is clear that many of our pressing environmental problems are linked. One of the many issues we have to contend with is depletion of natural resources. This means we are using minerals faster than they can be replenished through natural regeneration. Even some renewable resources, such as timber, are being used more quickly than new trees can be planted or grow. We are also diminishing the ability of the earth and its atmosphere to cope with our waste products, particularly carbon dioxide.