Susan Solomon hypothesized that ClO levels would be increased if ozone depletion came about because of CFCs. Her team found elevated levels of ClO in support of her hypothesis by measuring the composition of the atmosphere where the ozone hole was found, and also by analyzing light reaching the ground to determine whether it was changing in the region with less ozone and more ClO. Was this an observational or experimental study?

It is an observational study

Explanation:

In an observational study, nothing changes, all the researcher has to do is to record findings, it is a study that involves the collection of data in a real-world setting without intentionally manipulating any variable. On the contrary, an experimental study involves the manipulation of variables, you have the control group and the test group, the test group is subjected to the treatment.

no

explanation:

not everyone in america is free. it is has always been a unequal society. and yet people come in swarms, in search of better lives. some are brought as children, unaware, unknowing. some arrive and just don’t leave. they build lives, pay taxes, raise families. some enter illegally, fleeing persecution in their home country.

there are many reasons why human beings are so attracted to america, despite its history of bitterness towards immigrants.

there are almost two million immigrants brought to the us when they were children. president donald trump and his collaborators are determined to rid the us of as many undocumented immigrants as they can, and stop others from coming because none of their ancestors were immigrants.

america has so many things and yet it lacks the one thing that humanity needs to fully thrive. and so this country will not be at peace in itself until it resolves the pain at the heart of slavery, attacking immigrants, and crumble the rights of those with less power.

soviet influence spread across eastern europe sharply during and after wwii. the soviet armies liberated the countries in eastern europe and occupied them from the germans as they were forced to retreat towards germany.