Answer:
A. development of automobiles with lower nitrogen oxide and hydrocarbon emissions.
Explanation:
This act implements a comprehensive program to reduce air pollution to protect human health and environment, the amends made in 1990 focused on problems of acid rain, ozone depletion, and toxic air pollution, they established new auto gasoline reformulation requirements and set the Reid vapor pressure standards to control evaporative emissions from gasoline.
The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change.
Answer:
The answer to the question: What type of study is being conducted when Lad´s End Home mails a catalog with a fluffy set of towels on the cover to one group of consumers and the same catalog with a cover graphic of a beautifully-made bed to another consumer group to test differences between the two groups, would be: Experimental study.
Explanation:
The reason for this being the answer comes from the purpose that the researchers have given to the study itself. By sending the same catalog to two groups, each catalogue with a specific set of characteristics, to measure their responses to them and contrast the responses, these researchers are experimenting and seeking the results of that experimentation. This is why the answer is experimental, and not any of the other types of study types.
They needed more slaves to pick the cotton.
Sorry if this is wrong.=^\
Answer:
“I became insane, with long intervals of horrible sanity.” - Edgar Allen Poe
"Injustice anywhere is a threat to justice everywhere." - Martin Luther King Junior
"Life is like riding a bicycle. To keep your balance you must keep moving." - Albert Einstien
'We are not interested in the possibilities of defeat; they do not exist." - Queen Victoria
"Turn your wounds into wisdom." - Oprah Winfrey
Explanation:
