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When did it become illegal to intentionally vent HFC refrigerants into the atmosphere?
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Is it illegal to have nos?
Its not illegal to have but it does become illegal when used.
What were the challenges for making a refrigerator?
The largest challenge was (and still is) finding and making refrigerants that are both safe and effective. The earliest refrigerants were either highly toxic and/or highly flammable, many people died because of refrigerators using these refrigerants. With DuPont's invention of freons which are both nontoxic and nonflammable and thus seen as the ideal refrigerants, the refrigeration industry took off. But with the discovery that freons destroy the protective ozone layer of the atmosphere it has again become necessary to seek new refrigerants, most of the current options are slightly flammable!Another challenge was to develop seals for the pumps that compress the refrigerant that won't fail prematurely, allowing possibly toxic or flammable refrigerants to escape. Albert Einstein invented an electromagnetic pump with no moving parts (thus needing no seals), but the invention of "safe" freons made this unnecessary (however it later found use in liquid metal cooled nuclear reactor designs).
Did guns become illegal after World War 2?
No. We are still using them today, and thus, they did not become illegal.
When did drugs in sport become illegal?
They have always been illegal
When Did Slavery become illegal in Oregon?
Slavery was never legal in Oregon, so it never needed to become illegal.
When did Vicodin become illegal?
Vicodin is not illegal. It is controlled and requires prescription.
Is a marriage to an illegal alien valid if they only reason for the marriage by the illegal alien was to become a citizen?
it is illegal
When did tobacco become illegal to grow?
In the United States, it isn't illegal to grow.
When did owning a gun become illegal?
Owning a gun is not illegal if you follow the laws.
What are the uses of isotopes in every field?
When you mix an isotope substance into the fields, the plants that grow in them will become genetically mutated and grow in many different and bizzare ways. Growing plants in intentionally radioactive soil is unfortunately most likely illegal.
How did most illegal aliens become illegal?
Most of them bece illegal because they cross the U.S border without permission.
What is in the drugs that make them illegal?
Drugs become illegal when law makers decide to pass laws saying these drugs are illegal.
