NO.2 Ozone layer depletion
◆ Ozone (O3) layer: the Earth's protective layer ◆ Main hazards: strong UV (ultra-violet ray紫外线) radiation can damage immune system(免疫系统) of human natures and animals , cause skin cancer and cataracts(白内障), damage to the earth’s ecosystems(全球生态系统).
• 1.Ride bikes more often instead of driving cars. • e less elevator, many climb stairs.
• 3.Develop new and clear energy, like energy from wing and solar.
Environmental Protection
Environment
is the things around the center of things
The law of
Environmental Protection
Environment is :
air, water, land, minerals, forests grasslands, wildlife (野生动植物) aquatic flora and fauna(水生动植物) historical sites, scenic areas nature reserves, residential areas
◆ 6.Desertification---土地荒漠化 ◆ 7.Air pollution---大气污染 ◆ 8.Water pollution---水体污染 ◆ 9.Marine pollution---海洋污染 ◆ 10.Cross-boundary movements of