How can the rainforest be managed sustainably?

Logging and replanting - selective logging of mature trees ensures that the rainforest canopy is preserved. ... Planned and controlled logging ensures that for every tree logged another is planted.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.