When were the heat-trapping effects of gases that cause the greenhouse effect first measured by scientists?

Me < 3 there are multiple ‘3rd party’ political parties in the us. what are the benefits of having 3rd parties? what are the disadvantages of being a member of one? would the u.s. benefit if there were more 3rd parties created, more support for the current ones, or would it be best to get rid of them altogether? why?

Group formed to protect artisans and increase their profits

Which of the following words best describes gregor’s life as expressed in this passage the metaphorphosis