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Because of DDT birds would lay eggs without shells. Bald eagles became extinct in all states except Florida and Alaska. Pelicans became extinct in Louisiana. After DDT was banned a number of birds were introduced to their historic homelands from Florida and the few other places where they had survived.
Wiki User
∙ 13y ago
Wiki User
∙ 6y agoDDT is very efficient but also is persistent in the environment and toxic for humans and animals.
Wiki User
∙ 14y agobecause it works
Wiki User
∙ 7y agoDDT is toxic.
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The single greatest use of groundwater in the US is for?
irrigation
Why is sunrise important?
So we can use the the Energy from the sun for are solar pannles and for the future. Also to warm us up to grow are crops that we use for food. For us not to freeze to death.
What are ways to increase and decrease of the use of coal in the US?
add it and substact it
How long will it take for us to use up fossil fuels?
2 days
True or false coal use in the US accounts for most greenhouse gas emissions?
true
How has the use of DDt changes in the US since 1972?
DDT was banned.
How has the use of DDT changed in the US since 1972?
DDT was banned.
How did they fix the bald eagle from being extinct?
The bald eagle was first protected in the US and Canada in 1918 and in 1940, the US made it illegal to trap and kill bald eagles. In 1967, the bald eagle was first listed as an endangered species. A few years later, the use of the pesticide DDT was banned in the US. DDT had been one of the big killers of the Bald Eagle. With the banning of DDT, the species began to rebound.
Why was DDT banned in the US?
because it is toxic and is bad
What causes a bald eagles egg to crack?
Once upon a time, a pesticide called DDT was sprayed every-friggin-where. This stuff would build up in higher level predators, and in the case of eagles, it made their eggshells super-thin. DDT was banned in the US in 1972.
Which polluting chemical was banned from the US in 1971?
DDT also known as dichlorodiphenyltrichloroethane. It was commonly used as a pesticide until they discovered how bad its effects were. There were many appeals to rescind the ban but in 1971 it was upheld and made illegal.
What is the invention that has played a major role in allowing people to settle in warm regions of the US?
pesticide ddt
How can you reduce DDT pollution?
Reduced usage. it's banned in US already.
Where can you buy DDT?
When I was a kid back in the 50s, we use to spray ddt all around the house at night for mosquitos. We would spray it directly on us and as far as I know, we never suffered any adverse effects.
What is DDT and why was it banned in the US?
There was many health risks with bald eagles getting poisoned by it getting into the water supply. The fish in the water got poisined and the Bald Eagles ate the fish, they did NOT die though.
How did Rachel Carson's book Silent Spring alter the way people thought about and treated the Earth?
Carson's book, Silent Spring, introduced people to the idea that pesticides were having extremely negative effects on wildlife. Because of her book, the pesticide DDT was banned and the EPA was created. Senator Gaylord Nelson, from Wisconsin, promoted Earth Day.
It is right for us to use pesticides such as ddt at all and why?
DDT is toxic for humans and animals.
