防护

to defend / to protect

to protect / to defend / to guard against / to prevent

to protect

Green Wall of China, a massive afforestation program on the eastern margin of the Gobi Desert aimed at stopping the desert's expansion, started in 1978 and planned to be completed by 2050

individual protective equipment

chemical weapon defense

radiological defense

radiation protection

protective clothing; hazmat suit

safety goggles

collective protection