shield or cover used to provide protection against external elements or damage

a line or area of trees planted to provide protection from wind, water, or sand and to improve the environment

The 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 for completion by 2050

Organized civil defense or self-defense group within an organization, school, or factory consisting of more than one hundred people and responsible for fire safety, disaster relief, and general security.

Protective suit or clothing designed to protect the wearer from harmful environments; hazmat suit.

a belt or strip of trees planted to protect an area from wind or erosion

safety goggles; protective eyewear

protective equipment worn over the face to shield the user from harmful substances, including gas masks and respirators

measures or equipment used for the collective protection of a group, especially against chemical, biological, or nuclear threats

individual protective equipment; gear designed to protect the wearer from injury or infection

protection against the harmful effects of ionizing radiation; radiological defense

safety measures and procedures used to protect people and the environment from the harmful effects of ionizing radiation