A picture, from the NASA website, explains the natural process of the heating and cooling periods.

While right now the Earth may be on a rise in temperature, scientists are putting forth that this is a natural cycle and that eventually the Earth will begin a cooling period. Scientists prove this by looking deeper into the “rings of temperature sensitive tress” (science.nasa.gov).

However, the climate change is still an issue of concern even if it is part of a natural cycle. The increase of temperature is harmful to both the environment and to the ecosystem.

Scientists, “putting it all together,” believe that there is not just one cause of global warming. However, there is conclusive evidence that global warming is occurring whatever the cause may be.