The increase in Earth's average surface temperature due to rising levels of greenhouse gases. Global warming will change the patterns of the weather worldwide.
It is the effect of massive cut down of trees, usually a man-made action that damages the ecosystem. Reducing deforestation is one way to mitigate the impact of climate change.
Physical spread or growth of a city into outlying regions. Low growth prices and urban sprawl are all contributing factors.
Burnt ground or land with the aim of getting more or increasing crop areas. We have gone from settlement to scorched earth.
It is the wear of the ground that produces different processes on the Earth's surface because of the action of wind or water. Soil erosion is caused by non-infiltrated water that runs off fields.