How much has atmospheric CO₂ increased in approximately the last 50 years,according to the record for Hawaii's Mauna Loa observatory,in the figure below? 
Definitions:
Authority Decision
An authority decision is a decision made by the leader and then communicated to the group.
Leader-Member Relations
The dynamic and quality of the interaction and relationship between a leader and their team members, influencing team cohesion and performance.
Support
Providing assistance or encouragement to others in a way that enables them to increase their efficiency or effectiveness.
Concern For Task
The focus and priority given to accomplishing specific tasks, often in the context of leadership and team performance.
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