The World Health Organization considers smoke from dirty stoves to be one of the five most serious health risks that face people in poor, developing countries. Nearly 2 million people die from its effects each year, more than twice the number from malaria. And because the smoke contains greenhouse gasses such as carbon dioxide and methane, as well as black carbon, it contributes to climate change.

网络的安全策略包括技术和制度两个方面。它的制定涉及网络使用与管理制定和______两方面的内容。