What conclusion about international NGO’s can be drawn from the graph?

The contribution of NGOs is important not only in terms of the results that are achieved, and therefore for the optimism that people may feel about the defence of human rights in the world, but also because NGOs are, in a very direct sense, tools that are available to be used by individuals and groups throughout the world. They are managed and co-ordinated  as many organisations are  by private individuals, but they also draw a large part of their strength from other members of the community offering voluntary support to their cause. This fact gives them great significance for those individuals who would like to contribute to the improvement of human rights in the world.

Explanation:

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

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