Types+of+Plate+Boundaries

=volcano,road,trees,mountconvergent boundaries= =**Divergent boundaries occur wh en plate are rifted apart and be **=
 * Divergent Boundaries **

boundaries
An attempt to quantify the limits of humanity's load on our planet opens an important debate. In this issue of //Nature//, a group of renowned Earth-system and environmental scientists led by Johan Rockström of the Stockholm Resilience Centre sets out to define boundaries for the biophysical processes that determine the capacity for self-regulation .The framework presented is an attempt to look holistically at how humanity is stressing the entire. Provocatively, they go beyond the conceptual to suggest numerical boundaries for seven parameters: climate change, ozone depletion, ocean acidification, biodiversity, freshwater use, the global nitrogen and phosphorus cycles, and change in land use. The authors argue that we must stay within all of these boundaries in order to avoid catastrophic environmental change. gin to move apart, creating large expanses of oceanic crust. Crust is created in this type of boundaries.