But how is that possible for cities in low-income countries that are still struggling to keep their streets and water ways clean?
Instead of waking up to their buzzing, chirping and songs, there would be only silence. Like a series of dominoes, the effects would widen. Scores of plant species would be dying out, because the bees and other pollinators were gone. The animals that depended on those plants would die out next.
Rachel Carson imagined such a world in her ground-breaking book "Silent Spring," published in She rocked the world. Millions were stunned to discover the deadly consequences of our increasing dependence on potent pesticides.
Poisons like DDT dichlorodiphenyltrichloroethane slowly accumulated in each stage of the food chain almost destroying some birds of prey like peregrine falcons and even our national symbol, the bald eagle. People were not immune. Testing indicated high levels of the powerful chemical in people, too.
Now, DDT, once touted as perfectly safe for people, is listed as a carcinogen cancer-causing agent and has been linked to breast cancer.
DDT, for example, was heavily used in the United States because it was long lasting and highly effective at killing insects that decimated crops. Even today, some countries use it to kill mosquitoes in an attempt to reduce malaria and many less-developed nations still use these poisons in agriculture.
Beneficial insects were affected, too. Birds and other insect-eating creatures were being slowly poisoned. Before World War II there were thousands of nesting pairs of peregrines in the lower 48 states. By aboutthe peregrine was extinct east of the Mississippi and there were only 39 known pairs west of the Mississippi.
Chemicals like DDT interfered with the reproductive cycle of raptors. The growing awareness of the widespread toxic effects of DDT and similar chemicals finally led to action. In the late s and early s, scientists and environmentalists began organizing to find ways to counteract the damage. InDDT was banned in Canada.
It was banned in the United States in But it was almost too late. Falconers played a big part in saving the peregrine. Tom Cade, then a professor at Cornell University, established The Peregrine Fund inand gathered peregrines to begin a captive breeding project.
Some were from wild stock, but many came from falconers from throughout the United States and Canada. Today, The Peregrine Fund estimates it has released some 4, birds. One possible side effect of captive breeding programs has been the appearance of peregrines in more heavily populated areas, where they have been nesting in tall buildings, church towers and power plant smokestacks.
Their incursions into the human sphere have made them very popular. Bird watchers line up in metropolitan areas like Toronto and New York City to view peregrines that are nesting in skyscrapers. In the Midwest, power plants have been popular nesting sites for the raptors see http: Peregrines are one of the success stories of the environmental movement.
The birds, once near extinction, were removed from the Endangered Species List on Aug. Scientists like Cade, however, warn that the birds will have to be carefully monitored. Peregrines still have DDT in their systems and eggshells are still thinner than they should be.
In addition, the birds are still scarce in some traditional nesting areas, including the Northeastern U.Imagine a World Without Pandas - PowerPoint PPT Presentation. The presentation will start after a short (15 second) video ad from one of our sponsors. Fibers & Wood - Fibers & Wood Wood Next to food crops, perhaps human-kind s most important plant product.
May 30, · Best Answer: No world at all. The sun gives us life through photosynthesis, and a vitamin we can't live with out. The sun gives us life through photosynthesis, and a vitamin we can't live with out.
Plus, without the sun the world would be so cold we'd freeze caninariojana.com: Resolved. When seedlings of a particular species germinate in abundance without any special human assistance, it is a sure sign that the climatic and soil conditions are perfect for that species’ growth. The animal that you eat will be eating other animals which will eat plants.
Imagine no food for them, that will destroy the food cycle. Without any source of food, we will slowly decrease the nutritions we need to live leading the world to an end. imagine the music. The Ultimate Deep Listening Experience.
Explore and enjoy the IMAGINE album and the Ascot Sound Studios & Record Plant Sessions like you’ve never seen or heard them before. Plants are all around us. It is easy to become accustomed to their presence.
But, imagine a world without lush green grasses and trees - a planet blanketed in desert.