Urbanisation means that many new roads and buildings were build. It makes life easier for people. On the other hand it hurts nature, because you need to get rid of forests to build
So major areas is Spain, Italy, England, France, and also Germany.
Answer:
The answer is B
Explanation:
Tree rings form because during each growth season new water and food conducting cells (tracheids) are added around the perimeter of the tree trunk. Cells in the spring growth tend to be larger with thinner walls than the previous set of cells produced at the end of the previous summer. Over the course of the growing season, successive rings of cells become smaller with increasingly thick walls. In winter, growth ceases and no new cells are laid down. Then when the new growing season begins, thin-walled large cells form again producing a clear line between the old wood and the new wood because of the difference in texture.
Tree rings provide a record of past climate because their width is determined by tree growth rate, which in turn is determined by environmental conditions. Since one ring is produced every year (usually) the ages of the climatic events can be worked out very precisely by counting back. Records from young trees, old trees, house and ship timbers and fossil trees can be tied together by identifying sections with the same sequence of climatic event, the records overlap in time where the climatic patterns they record match up.
The continents that currently have sufficient water to meet the needs of their populations are North America, South America, Africa, and Australia.
The remaining continents do not - and they have to find their water elsewhere in order to provide all people with enough water for their everyday needs.
