Therefore, a new cavern detection technique called accumulation energy difference method was proposed, which USES the seismic reflection energy difference in trace or between traces to detect caves.

Ecosystems thus involve the circulation, transformation, and accumulation of energy and matter through the medium of living things and their activities.

But the biggest change in Earth's energy budget by far over the past hundred years is due to the accumulation in our atmosphere of greenhouse gases, which limit the exit of heat into space.