ozone was thinning, polluted air, waste water, contaminated by the sea, Dong paddy field destruction: the species of plant and animal varieties dropped, the population is rising fast, v ... a wide range of issues. In fact, the factors that do harm to the life on the Earth.environmental scientists have essential up 8 big factor environmental pollution problems.1. Acid rain-it's vandalism of the vents kind of trees, causing them to lose the balance of photosynthetic effect: water resources in lake acidity do ponds, rivers.2. the concentration of co2 in the air rise up: make the temperature in the air increases, naturally lost by.3. Ozone Layer destruction, makes ultraviolet in sunlight being menace directly to life on Earth.4. Chemistry, environmental pollution; the world has over 670 thousand kinds of commercial chemical goods; in the toxic chemicals have had up to 15 thousand types; every year there were up to 500 thousand people poisoned; hit by toxic when used not paying attention or handling of scrap not satisfactorily.5. water quality: pollution in the world have to 5 million people die from contaminated water, some have up to 1 billion people do not have clean water to use.6. The land suffer desertification: do the forests destroyed, grazing and farming chemical levels, indiscriminately make alkaline soil and sand. Each year on Earth has about 7 million hectares of farmland suffered desertification.7. Tropical rainforest is reduced much, due to indiscriminate cutting, forest fires due to natural and human causes; each year on Earth has about 17 million acres of forest destruction; about 0.9% of the total land area of the Earth.8. The reputation of rare nuclear: 1991 423 new atomic power station of 26 countries are operating, to the late 20th century has added 100 more factories; all the nuclear waste are dumped into the sea. On Earth longer than 5 thousand nuclear warheads are deployed all over the world, always threaten peace and the survival of humanity.
đang được dịch, vui lòng đợi..
